Is the sympathetic nerve procedure for treating hyperhidrosis safe

Excessive sweating (hyperhidrosis) is a condition that can significantly affect daily life, particularly when it causes excessive sweating of the hands, underarms, or face and does not respond to antiperspirants or conventional treatments. When the problem persists, some people may seek more effective solutions, including sympathetic nerve surgery (sympathectomy), a procedure designed to reduce the activity of the nerves responsible for stimulating sweating in specific areas of the body.But is sympathectomy for hyperhidrosis safe? How is the procedure performed? What results can be expected, and what are the potential risks or complications? Can stopping sweating in one area lead to increased sweating in other parts of the body?In this article on Dalili Medical, we will explore the indications for sympathectomy, its types and surgical techniques, how to prepare for the procedure, and its expected results and potential risks, helping you gain a clearer understanding before making a treatment decision.

1. What Is Sympathetic Nerve Surgery?

Sympathetic nerve surgery (sympathectomy) is a surgical procedure designed to reduce or interrupt the transmission of sympathetic nerve signals responsible for stimulating sweating in specific areas of the body. It is most commonly used to treat severe cases of hyperhidrosis, particularly affecting the hands, underarms, and face.

2. Why Is Sympathetic Nerve Surgery Performed?

The procedure is generally performed to treat severe primary hyperhidrosis that does not respond to other treatments. It may also be considered in certain medical conditions, such as severe facial blushing or some sympathetic pain syndromes, depending on the specialist's assessment and whether surgery is appropriate for the patient's condition.

3. Is Sympathetic Nerve Surgery Dangerous?

Sympathetic nerve surgery is a well-established procedure, commonly performed using video-assisted thoracoscopic surgery (VATS). However, like any surgical procedure, it carries certain risks and potential complications. These include compensatory sweating in other areas of the body, pneumothorax (collapsed lung), and postoperative pain. Injury to nearby nerves is considered a rare complication.

4. How Long Does Sympathetic Nerve Surgery Take?

The procedure typically takes approximately 30 to 60 minutes. However, the duration may vary depending on the surgical technique, whether one or both sides are treated, and the patient's overall health condition.

5. Is Sympathetic Nerve Surgery Performed Under General Anesthesia?

Yes. Sympathetic nerve surgery performed using thoracoscopy is usually carried out under general anesthesia to ensure that the patient does not experience pain and to provide suitable conditions for safe surgery.

6. Is Thoracoscopic Sympathetic Nerve Surgery Better Than Open Surgery?

Thoracoscopic surgery is preferred in most suitable cases because it involves small surgical incisions, which may help reduce postoperative pain and speed up recovery compared with open surgery. However, the surgeon determines the most appropriate approach based on the patient's condition and the nature of the required procedure.

7. When Do the Results of Sympathetic Nerve Surgery Become Noticeable?

The results are usually noticeable shortly after surgery. Patients with excessive sweating of the palms, in particular, may experience a significant reduction in sweating within the first few hours after surgery or immediately after recovering from anesthesia.

8. What Is the Success Rate of Sympathetic Nerve Surgery?

The success rate varies depending on the targeted area, the surgical technique used, and the criteria used to evaluate the results. Studies have reported favorable outcomes in many patients with primary palmar hyperhidrosis. However, the same results cannot be guaranteed for every patient.

9. Are the Results of Sympathetic Nerve Surgery Permanent?

The results may last for many years in many patients. However, some individuals may experience partial recurrence of sweating over time. Therefore, lifelong results cannot be guaranteed.

10. Does Sympathetic Nerve Surgery Cause Compensatory Sweating?

Yes. The procedure may lead to a condition known as compensatory sweating, which involves increased sweating in other areas of the body, such as the back, chest, abdomen, and thighs. This is one of the most common potential complications of the procedure, and its severity can vary from one patient to another.

11. Can Compensatory Sweating Be Prevented After Sympathetic Nerve Surgery?

There is no guaranteed way to completely prevent compensatory sweating. However, discussing the appropriate level of sympathetic nerve interruption with the surgeon and avoiding a more extensive procedure than necessary may help reduce the likelihood or severity of this complication.

12. Does Sympathetic Nerve Surgery Cause Dry Hands?

Yes. The procedure may significantly reduce sweating in the palms, which is its primary goal in patients with palmar hyperhidrosis. However, some patients may experience excessive dryness in their hands after surgery.

13. Can Sweating in the Hands Return After Sympathetic Nerve Surgery?

Reduced hand sweating may persist for many years after surgery. However, some patients may experience partial recurrence of sweating over time. This may be related to anatomical variations in the sympathetic nervous system or the persistence of certain nerve pathways responsible for stimulating sweat production.

14. How Long Is the Recovery Period After Sympathetic Nerve Surgery?

Many patients can resume light daily activities within a few days after surgery. However, returning to regular physical activities and achieving full recovery may take several weeks, depending on the patient's overall health, recovery progress, and adherence to medical instructions.

15. Does Sympathetic Nerve Surgery Leave Scars?

Thoracoscopic sympathetic nerve surgery usually leaves small scars at the sites where the surgical instruments are inserted. These scars generally become less noticeable over time as the wounds heal.

16. Does Sympathetic Nerve Surgery Affect Heart Rate?

The procedure may cause a decrease in heart rate in some patients because it affects sympathetic nerve pathways that contribute to regulating heart activity. Therefore, the medical team carefully monitors the patient's heart rate and vital signs during and after surgery.

17. Does Sympathetic Nerve Surgery Affect Sexual Function?

Thoracoscopic sympathetic nerve surgery for hand hyperhidrosis is not generally expected to affect sexual function. However, surgery involving the lumbar sympathetic chain to treat excessive foot sweating may affect certain sexual functions, particularly ejaculation in men.

18. Can Sympathetic Nerve Surgery Be Performed to Treat Excessive Foot Sweating?

Surgery involving the lumbar sympathetic chain may be considered to treat excessive foot sweating in selected cases. However, it is not a common procedure or a first-line treatment option because of its potential risks. Treatment alternatives should therefore be evaluated, and the potential benefits and complications should be discussed with a specialist before making a decision.

19. Can Sympathetic Nerve Surgery Be Performed to Treat Facial Sweating?

Yes. The procedure may be considered in certain cases of severe facial hyperhidrosis after careful evaluation. However, surgery in this area requires particular caution because of the proximity of nerves responsible for eye function and the potential risk of Horner's syndrome, which may include drooping of the upper eyelid (ptosis) and changes in pupil size.

20. Can Sympathetic Nerve Surgery Be Performed More Than Once?

An additional surgical intervention may be considered in certain cases where the first procedure did not achieve the desired therapeutic results. However, the decision depends on the cause of persistent sweating, the type of previous procedure, the patient's overall health, and the potential risks of repeat surgery.

21. Can Sympathetic Nerve Surgery Be Reversed After the Procedure?

Normal nerve function cannot be guaranteed to return after the sympathetic chain has been cut or partially removed. Even when surgical clips are used, removing them does not guarantee that nerve signals will return to normal. Therefore, the procedure should be considered an intervention whose effects may be permanent.

22. Are There Alternatives to Sympathetic Nerve Surgery?

Yes. Several treatment options are available before considering surgery. The most appropriate treatment depends on the severity of sweating, the affected area, and the patient's response to previous treatments. Some of the most common alternatives include:

Topical antiperspirants: Products containing aluminum chloride can help reduce sweat production.
Botox injections: These work by reducing the activity of the nerves that stimulate sweat glands in the injected area.
Iontophoresis: This treatment involves passing a low-intensity electrical current through water to reduce sweating. It is commonly used to treat excessive sweating of the hands and feet.
Medications that reduce sweating: Doctors may prescribe certain medications that decrease sweat gland activity, depending on the patient's condition and potential side effects.
Other topical treatments: These may be suitable for certain areas of the body, depending on the type and severity of hyperhidrosis.

How to Prepare for Sympathetic Nerve Surgery

Sympathetic nerve surgery requires certain medical preparations and precautionary measures before the procedure. These steps help ensure that the patient is suitable for anesthesia and surgery, reduce the risk of complications, and support a smoother recovery. Preparations may include medical tests, reviewing the patient's medical history and current medications, and following the surgeon's instructions before the scheduled procedure.

First: Medical Tests Before Surgery

The doctor may request several tests to assess the patient's overall health and determine whether they are ready for anesthesia and surgery. These may include:

1. Blood Tests: These may include a complete blood count (CBC), kidney and liver function tests, and blood clotting tests, depending on the patient's medical condition and history.

2. Electrocardiogram (ECG): This test evaluates the electrical activity of the heart, checks heart rhythm, and helps identify any abnormalities that may require further assessment before surgery.

3. Chest X-ray: The doctor may request a chest X-ray to assess the condition of the lungs and heart, particularly because the procedure is commonly performed using thoracoscopic surgery.

4. Pulmonary Function Tests: Some patients may need these tests, especially those with a history of lung disease or respiratory problems.

5. Medical and Anesthesia Assessment: This includes reviewing the patient's medical history, current medications, and any known drug allergies, as well as evaluating their suitability for general anesthesia.

Second: Instructions to Follow Before Surgery

Patients should follow several instructions before undergoing sympathetic chain cutting or cauterization surgery to help minimize risks and prepare for the procedure. These include:

1. Inform the Doctor About Current Medications: Patients should tell their doctor about all medications and dietary supplements they take, especially blood thinners and anticoagulants. The doctor will determine whether any dosage adjustments or temporary discontinuation are necessary. No medication should be stopped without medical advice.

2. Fasting Before Surgery: Patients must follow the anesthesiologist's instructions regarding how long to avoid eating and drinking before surgery to reduce the risk of complications during general anesthesia.

3. Stop Smoking: Quitting smoking well before surgery is recommended because smoking can negatively affect lung function, increase the risk of respiratory complications, and interfere with tissue healing.

4. Inform the Doctor About Medical History: Patients should disclose any chronic conditions, such as heart disease, lung disease, diabetes, or high blood pressure, so the medical team can assess potential risks and take the necessary precautions.

5. Report Any Drug Allergies: Patients should inform their doctor about any previous allergic reactions to anesthetic medications, antibiotics, or other drugs to avoid substances that could trigger an allergic reaction.

6. Shower and Maintain Personal Hygiene: Patients are generally advised to shower before surgery and follow the hospital's instructions regarding skin cleansing and preparation of the surgical area.

7. Arrange Transportation Home: It is preferable to have someone accompany the patient and assist them after surgery, particularly during the first few hours following recovery from anesthesia. Patients should avoid driving or performing activities that require concentration until their doctor confirms it is safe.

Mental Preparation and Understanding the Expected Results and Potential Complications

Before surgery, patients should understand the expected outcomes and possible complications, including:

Risk of compensatory sweating: Sweating may increase in other areas of the body, such as the back, abdomen, chest, and thighs. The severity and affected areas vary from one patient to another.
Possibility of pain or numbness: Patients may experience chest pain, discomfort around the surgical incisions, or temporary numbness after surgery. These symptoms generally improve gradually.
Potential surgical or anesthesia-related complications: These may include pneumothorax, which is the accumulation of air in the space surrounding the lungs, as well as other complications whose likelihood depends on the patient's individual condition.
Possibility of persistent or recurrent sweating: Hyperhidrosis symptoms may not disappear completely in some patients, and sweating may partially return after a period of time following surgery.

Sympathetic Nerve Surgery

First: Types of Sympathetic Nerve Surgery

Sympathetic nerve procedures used to treat certain cases of hyperhidrosis can be classified into several techniques based on the surgical approach. These techniques aim to reduce or interrupt the transmission of nerve signals responsible for stimulating the sweat glands by targeting a specific part of the sympathetic chain.

1. Sympathetic Chain Division (Sympathicotomy)

Sympathetic chain division is one of the techniques used to treat hyperhidrosis. It involves cutting a specific section of the sympathetic chain to reduce the transmission of nerve signals that stimulate the sweat glands.

How Is the Procedure Performed?

The patient is placed under general anesthesia.
The surgeon makes small incisions in the chest area, usually near the armpit.
A small camera and specialized surgical instruments are inserted through these incisions to access the chest cavity.
The sympathetic chain, located alongside the spine, is identified.
The targeted section of the chain is divided using precise surgical instruments. Electrocautery may also be used to assist with the procedure.
The same procedure is repeated on the opposite side if required by the surgical plan, and the incisions are then closed.

2. Partial Removal of the Sympathetic Chain (Sympathectomy)

This technique involves removing a specific section of the sympathetic chain. The removal may also include some associated sympathetic ganglia, depending on the targeted area and surgical plan.

How Is the Procedure Performed?

The patient is placed under general anesthesia.
The surgeon inserts a thoracoscope and surgical instruments through small incisions in the chest.
The targeted section of the sympathetic chain is identified.
The required portion of the nerve chain is removed using specialized surgical instruments.
The surgeon ensures that bleeding is controlled and the surrounding tissues remain intact.
The surgical incisions are closed once the procedure is complete.

3. Sympathetic Chain Cauterization (Sympathetic Nerve Cauterization)

This technique involves creating thermal damage to the targeted section of the sympathetic chain using an electrocautery device to interrupt nerve signal transmission through that area.

How Is the Procedure Performed?

The patient undergoes general anesthesia.
The surgeon inserts a thoracoscope and specialized surgical instruments through small incisions in the chest.
The targeted level of the sympathetic chain is identified.
An electrocautery device is used to create thermal damage to the selected section.
The surgeon examines the area to ensure that the procedure is complete and any bleeding is controlled.
The procedure is concluded after checking the lung and surrounding tissues, and the incisions are closed.

4. Sympathetic Chain Clipping (Sympathetic Clipping)

This technique involves placing a specialized surgical clip on a specific section of the sympathetic chain to compress it and interrupt the transmission of nerve signals through that area.

How Is the Procedure Performed?

The patient is placed under general anesthesia.
The surgeon inserts a thoracoscope and surgical instruments into the chest cavity through small incisions.
The sympathetic chain and the targeted nerve level are identified.
A specialized surgical clip is placed over the selected section.
The surgeon ensures that the clip is securely positioned before completing the procedure and closing the incisions.

In theory, the clip can be removed during a subsequent operation. However, this does not guarantee restoration of normal nerve function or a return to normal sweating, as compression may cause permanent nerve damage.

5. Division of Sympathetic Nerve Branches (Ramicotomy)

This technique differs from directly dividing the sympathetic chain. It involves cutting specific nerve branches that connect the sympathetic chain to adjacent nerve pathways, rather than cutting the main sympathetic chain itself.

How Is the Procedure Performed?

The patient undergoes general anesthesia.
The surgeon uses a thoracoscope to access the targeted area.
The specific nerve branches to be divided are identified.
The selected branches are cut using specialized surgical instruments.
The surgeon examines the area to ensure that surrounding tissues and nerves have not been damaged.

The use of this technique depends on the patient's condition and treatment goals, and it is not necessarily performed in all cases of hyperhidrosis.

Second: Surgical Approaches to the Sympathetic Nerve Procedure

In addition to the different techniques used to target the sympathetic chain, the procedure can also be classified according to the surgical approach used to access the targeted area. These approaches include:

1. Endoscopic Thoracic Sympathectomy (ETS)

Endoscopic thoracic sympathectomy is one of the most commonly used surgical approaches for treating severe primary palmar hyperhidrosis (excessive sweating of the hands). It may also be used in selected cases of facial or axillary hyperhidrosis, depending on the surgeon's assessment.

How Is the Procedure Performed?

The patient is placed under general anesthesia.
The surgeon makes one or more small incisions in the chest, usually near the armpit.
A thin endoscope equipped with a small camera is inserted to visualize the chest cavity and locate the sympathetic chain.
The lung on the operated side may be temporarily collapsed to provide adequate space for the surgical procedure.
The surgeon identifies the targeted anatomical level of the sympathetic chain.
The selected intervention is performed using the chosen technique, such as cutting, excision, cauterization, or clipping.
The lung is then allowed to re-expand, its condition is checked, and the surgical incisions are closed.

2. Open Sympathetic Nerve Surgery

This approach involves accessing the sympathetic chain through a larger incision in the chest wall rather than using an endoscope through small incisions.

How Is the Procedure Performed?

The patient is placed under general anesthesia.
The surgeon makes a surgical incision in the chest wall to access the targeted area.
The surgeon reaches the region surrounding the spine, where the sympathetic chain is located.
The specific portion of the sympathetic chain that needs to be cut or removed is identified.
The appropriate surgical intervention is performed, followed by bleeding control and wound closure.

Levels of Sympathetic Chain Interruption and How the Appropriate Level Is Selected

The surgeon may consider different anatomical levels of the thoracic sympathetic chain, depending on the patient's condition. These may include:

Intervention level	Potential use
R3	May be used to treat severe palmar hyperhidrosis and may be considered in selected cases of facial sweating, depending on the surgical assessment.
R4	May be used to treat excessive hand sweating and may help reduce excessive dryness of the hands, although results and the risk of compensatory sweating vary among patients.
R5	May be considered in selected cases of axillary hyperhidrosis or excessive sweating affecting multiple areas, depending on the patient's condition and surgical plan.

How Does the Surgeon Choose the Appropriate Level?

There is no single approach that is suitable for all patients. The choice depends on several factors, including:

The affected area, whether the hands, face, or armpits.
The severity of sweating and its impact on daily activities.
The patient's expectations and desired surgical outcomes.
The balance between reducing sweating in the targeted area and the possibility of developing compensatory sweating in other parts of the body.

For example, selecting the R3 level may result in drier hands compared with R4, whereas the hands may remain relatively more moist when R4 is selected.

However, this does not mean that one level is universally better than another. The final decision requires an individualized assessment and a discussion with the surgeon about the expected outcomes and potential complications.

Important Note: The terms R3, R4, and R5 refer to anatomical levels of the thoracic sympathetic chain. The way surgeons describe the targeted level may vary between medical references and surgical practices. Therefore, the intended level should be clearly specified when preparing medical content, and these levels should not be presented as fixed options or general treatment recommendations.

Sympathetic Nerve Surgery According to the Affected Area

The goals of sympathetic nerve surgery vary depending on the area affected by excessive sweating. The targeted nerve level and surgical technique are also selected according to the location and severity of symptoms.

The areas that may be considered for this procedure include:

1. Sympathetic Nerve Surgery for the Hands

The procedure aims to reduce excessive sweating in the palms. Severe primary palmar hyperhidrosis is one of the most common indications for thoracic sympathetic surgery, particularly when the condition does not respond to non-surgical treatments.

2. Sympathetic Nerve Surgery for the Armpits

This procedure aims to reduce excessive sweating in the underarm area. It may be considered in selected cases; however, the response may be less consistent or predictable than it is when treating excessive palmar sweating.

3. Sympathetic Nerve Surgery for the Face

Thoracic sympathetic surgery may be used to treat certain cases of severe facial hyperhidrosis following a thorough medical assessment.

This procedure requires careful consideration because the targeted nerve levels are located near important nerves and anatomical structures. Potential complications include Horner's syndrome, although this is a rare complication.

4. Sympathetic Nerve Surgery for the Feet

Treatment of excessive foot sweating differs from thoracic sympathetic surgery, as intervention on the lumbar sympathetic chain may be considered in limited cases.

However, lumbar sympathectomy is not considered a routine treatment for plantar hyperhidrosis because of its potential risks, including effects on sexual function, particularly ejaculatory disorders in men.

What Are the Expected Results After Sympathetic Nerve Surgery?

The results of sympathetic nerve surgery vary from one patient to another, depending on the affected area, the targeted nerve level, and the nature of the condition. Some of the most noticeable outcomes after surgery may include:

1. Significant Reduction in Hand Sweating

Many patients experience a noticeable reduction in excessive sweating of the palms after thoracic sympathetic surgery. The hands may become significantly drier shortly after the procedure.

2. Reduction in Facial Sweating

The procedure may help reduce excessive facial sweating in patients who undergo the appropriate surgical intervention for this condition. However, the response varies depending on the patient's condition and the selected nerve level.

3. Improvement in Underarm Sweating

Excessive sweating in the armpits may decrease after surgery, particularly when the appropriate nerve level is selected. However, results can vary, and complete elimination of sweating cannot be guaranteed.

4. Improved Ability to Perform Daily Activities

Reducing excessive sweating may make it easier for patients to perform activities that were previously affected by the condition, such as:

Writing.
Using electronic devices.
Shaking hands with others.
Holding objects.
Performing various everyday activities.

5. Improved Psychological and Social Well-Being

Reducing excessive sweating may help decrease embarrassment and anxiety associated with the condition. This can help some patients improve their self-confidence, social interactions, and overall quality of life.

When Do the Results of Sympathetic Nerve Surgery Appear?

One of the main characteristics of sympathetic nerve surgery is that its effect on the targeted sweating area may become noticeable quickly, particularly when treating palmar hyperhidrosis.

The results can be observed and evaluated during the following stages:

Immediately after surgery: Patients may notice a significant reduction in hand sweating after waking up from anesthesia. The dryness of the hands may become noticeable within a short period.
During the first few days: The effects of surgery become more apparent during everyday activities.
During the following weeks: The patient and surgeon can assess how stable the results are and monitor any changes in sweating patterns in different parts of the body, including the development of compensatory sweating.
In the long term: Reduced sweating in the targeted area may persist for years. However, the degree of improvement and the possibility of persistent or partially recurring symptoms vary from person to person.

What Are the Side Effects and Risks of Sympathetic Nerve Surgery?

Although sympathetic nerve surgery may help reduce excessive sweating and improve quality of life, it can be associated with certain side effects and complications. Their severity and likelihood vary from one patient to another.

The most notable potential complications include:

1. Compensatory Hyperhidrosis

Compensatory sweating is one of the most well-known complications of sympathetic nerve surgery. It occurs when sweating increases in other parts of the body after sweating has been reduced in the surgically targeted area.

It may affect different areas, including:

The back and chest.
The abdomen.
The thighs.
The legs.
Other parts of the body.

Its severity may range from mild to moderate or severe. It may also become more noticeable in hot weather or during physical activity.

Compensatory sweating is an important complication to discuss with the surgeon before undergoing the procedure, as no surgical technique can guarantee its complete prevention.

2. Excessive Hand Dryness

Interrupting the nerve signals responsible for stimulating sweat production may cause the hands to become drier than desired, particularly after surgery for palmar hyperhidrosis.

This may lead to symptoms such as:

Dry and cracked skin.
A feeling of tightness or roughness.
Skin irritation in some cases.
Discomfort when holding certain objects.

These symptoms can often be relieved by using appropriate moisturizers and following the doctor's skin-care recommendations.

3. Horner's Syndrome

Horner's syndrome is a rare complication that may occur if the sympathetic nerve pathways near the stellate ganglion are injured during surgery, particularly when operating on the upper thoracic sympathetic levels.

Symptoms may include:

Drooping of the upper eyelid on the affected side (ptosis).
Constriction of the affected pupil (miosis).
Unequal pupil sizes.
Reduced sweating on the affected side of the face in some cases.

Symptoms may be temporary or permanent, depending on the nature and severity of the nerve injury.

4. Chest Pain After Surgery

Patients may experience pain in the chest or armpit area after surgery due to the surgical incisions and manipulation of tissues within the chest cavity.

Associated symptoms may include:

A feeling of tightness in the chest.
Pain during movement or deep breathing.
Discomfort around the endoscope insertion sites.

Pain generally improves gradually during recovery and can be managed with pain medications prescribed by the doctor.

However, severe or worsening pain, particularly when accompanied by shortness of breath, requires medical evaluation.

5. Pneumothorax

Pneumothorax occurs when air leaks into the space between the lung and the chest wall, potentially causing part or all of the lung to collapse.

Possible symptoms include:

Sudden chest pain.
Shortness of breath.
Rapid breathing.
Increased heart rate.

Treatment depends on the size of the pneumothorax and the severity of symptoms. Some cases may only require observation, while others may require the insertion of a chest tube to remove the air and allow the lung to re-expand.

6. Bradycardia (Slow Heart Rate)

Some patients may develop a slow heart rate after sympathetic nerve surgery due to changes in the neural regulation of cardiac activity. This may be associated with the specific nerve levels involved in the procedure.

Possible symptoms include:

Dizziness or lightheadedness.
Fatigue and weakness.
Low blood pressure in some cases.
Fainting if the heart rate becomes severely slow or affects blood flow to the brain.

Management depends on the degree of bradycardia and the associated symptoms. Cases involving fainting or severe dizziness may require urgent medical evaluation.

7. Persistent Sweating or Partial Recurrence

The procedure does not achieve the desired results in every patient. Sweating may persist in the targeted area to varying degrees or partially return after a period of time.

This may be associated with several factors, including: