Back and neck pain are among the most common health problems and can significantly affect mobility, sleep, and the ability to perform daily activities. With the development of pain management techniques, spinal injections have become a treatment option for certain conditions, particularly when pain is associated with nerve irritation, herniated discs, or inflammation of the joints surrounding the spine.Spinal injections vary in type, technique, and purpose. Some are used to reduce inflammation and pain around the nerves, while others target specific joints or areas suspected to be the source of pain. Although these procedures may help some patients reduce pain and improve mobility, they are not suitable for every condition and may involve certain benefits and potential risks that should be understood before undergoing treatment.In this Daleeli Medical guide, we explore the types of spinal injections, how they are performed, their potential benefits, possible risks and side effects, as well as important tips to follow before and after the procedure, helping you better understand the treatment and make a more informed decision in consultation with your specialist.

What Are Spinal Injections?

Spinal injections are medical procedures used to help relieve chronic back and neck pain and reduce inflammation and irritation around the nerves, particularly in conditions caused by herniated discs, spinal stenosis, or compression of the nerve roots. The type of injection and the site of administration vary depending on the underlying cause of pain and the patient's medical condition.

Do Spinal Injections Treat a Herniated Disc?

In most cases, spinal injections do not remove or repair the herniated disc itself. Instead, they aim to reduce inflammation and pain caused by irritation or compression of a nerve. This may help the patient regain mobility and participate more effectively in physical therapy during the recovery period.

Are Spinal Injections Painful?

The injection site is usually numbed with a local anesthetic before the procedure, so discomfort is generally limited. The patient may feel a brief needle prick or pressure as the needle is inserted. In some cases, there may also be temporary pain or numbness that travels along the path of the targeted nerve.

Does the Patient Need General Anesthesia During the Injection?

Most spinal injections performed to treat pain do not require general anesthesia, and the patient remains awake throughout the procedure. In some cases, a mild sedative may be used to help the patient relax, depending on the type of procedure, the patient's medical condition, and the physician's assessment.

Is Imaging Used During Spinal Injections?

Yes. Many types of spinal injections are performed using X-ray or CT imaging to accurately guide the needle to the targeted area and improve the safety of the procedure. A contrast agent may also be used to confirm that the needle is positioned correctly before the medication is injected.

When Does the Effect of a Spinal Injection Begin?

The local anesthetic may provide relief relatively quickly, although its effect is usually temporary. Corticosteroids, on the other hand, may take several days to produce their anti-inflammatory effect and noticeable pain relief. The speed and degree of improvement vary from one patient to another.

How Long Does the Effect of a Spinal Injection Last?

The duration of pain relief varies depending on the type of procedure, the underlying cause of pain, and the patient's overall health. Some patients may experience relief for a short period, while others may experience improvement lasting several weeks or months. In some cases, the injection may not provide significant relief.

Can Spinal Injections Be Repeated?

Spinal injections may be repeated in certain cases, but this should be determined based on the physician's assessment and the patient's response to treatment. Repeated corticosteroid injections should not be performed too frequently or without medical supervision because repeated corticosteroid exposure may increase the risk of side effects and complications.

Can Spinal Injections Replace Surgery?

In some cases, spinal injections may reduce pain and improve mobility, potentially delaying the need for surgery or making surgery unnecessary. However, injections are not an appropriate substitute for surgery in every situation. If there is progressive neurological weakness or significant nerve compression, the patient may require a specialized surgical evaluation.

Can the Patient Walk After a Spinal Injection?

In most cases, patients can walk after the procedure and the observation period recommended by the physician. However, temporary numbness or weakness in the limbs may occur because of the local anesthetic. Patients should follow their physician's instructions and avoid driving or activities that require concentration or balance until these symptoms have completely resolved.

Can Patients With Diabetes Undergo Spinal Injections?

Patients with diabetes may be able to undergo spinal injections in certain circumstances. However, they should inform their physician about their diabetes before the procedure because corticosteroids used in some injections may temporarily increase blood glucose levels. The physician may recommend more frequent blood glucose monitoring after the injection and provide appropriate instructions based on the patient's condition.

Do Blood Thinners Prevent Spinal Injections?

Not all blood-thinning medications prevent patients from undergoing spinal injections. However, some medications may increase the risk of bleeding during or after the procedure. Patients should inform their physician about all medications they take, particularly anticoagulants and other blood-thinning medications, before undergoing the injection.

Patients should never stop taking blood-thinning medication on their own. The physician should determine whether the medication needs to be stopped or adjusted and how long this should be done before and after the procedure.

When May Spinal Injections Not Be Appropriate?

Spinal injections may not be appropriate in certain situations, such as an infection or inflammation at the injection site, bleeding or clotting disorders, or other medical conditions that may increase the risks associated with the procedure.

In addition, simply having back pain does not necessarily mean that a spinal injection is the appropriate treatment. The choice of treatment depends on the underlying cause of the pain, the clinical examination, and imaging findings when appropriate.

When Should Immediate Medical Attention Be Sought After a Spinal Injection?

Urgent medical evaluation should be sought if unusual symptoms develop after the injection, particularly:

• New or worsening weakness in the legs or arms.

• Loss of bladder or bowel control.

• Numbness or loss of sensation in the area between the thighs.

• Fever or chills.

• Severe or progressively worsening pain.

• Swelling of the face or tongue or difficulty breathing, which may indicate a severe allergic reaction.

If any of these symptoms occur, the patient should not wait or attempt to manage them at home. They should contact their physician or seek urgent medical care.

Types of Spinal Injections

There are several types of spinal injections used to treat back pain, neck pain, and sciatica. The choice of injection depends on the cause and location of the pain, the patient's symptoms, and the findings of the clinical examination and imaging studies. The main types include:

1. Epidural Steroid Injection

An anti-inflammatory medication, usually a corticosteroid combined with a local anesthetic, is injected into the epidural space near the nerve roots to help reduce inflammation and relieve pain.

Epidural steroid injections may be used in certain conditions, including:

• Sciatica caused by a herniated disc.

• Spinal stenosis associated with pain radiating into the leg or arm.

• Inflammation or irritation of the nerve roots.

• Certain cases of neck pain that radiates into the arm.

There are several approaches for administering an epidural injection, including:

• Interlaminar approach: The needle is inserted from the back of the spine between the vertebral laminae.

• Transforaminal approach: The needle is directed through the opening through which a nerve root exits the spine, allowing the physician to target a specific nerve root.

• Caudal approach: The needle is inserted through an opening in the lower part of the sacrum to reach the epidural space.

Important: These injections may help reduce inflammation and pain, but they do not directly remove or repair a herniated disc.

2. Selective Nerve Root Block

In this procedure, the needle is directed to the area surrounding a specific nerve root. It may be used for both therapeutic and diagnostic purposes.

It may help to:

• Reduce pain and inflammation around the affected nerve.

• Identify which nerve root is responsible for the patient's symptoms, particularly when imaging shows abnormalities at more than one spinal level.

For example, if an MRI shows herniated discs at multiple levels, a selective nerve root block may help the physician determine which level is most likely responsible for the patient's symptoms.

3. Facet Joint Injection

Facet joints are small joints located at the back of the vertebrae. They can be a source of neck or lower back pain.

A facet joint injection may contain:

• A local anesthetic to relieve pain.

• A corticosteroid to help reduce inflammation.

Facet joint injections may be appropriate in certain cases when the pain is:

• Localized to the neck or lower back.

• Less associated with pain radiating into the arm or leg.

• Related to specific movements or degenerative changes in the joints.

4. Medial Branch Block

The medial branch nerves are small nerves that transmit pain signals from the facet joints.

A small amount of anesthetic is injected near these nerves. In many cases, the primary purpose is diagnostic—to determine whether the facet joints are the source of the patient's pain.

If the injection produces significant but temporary pain relief, the physician may consider the patient a potential candidate for radiofrequency ablation. This is a minimally invasive procedure designed to reduce the nerve's ability to transmit pain signals and is not an injection itself.

5. Sacroiliac Joint Injection

The sacroiliac joint is located between the sacrum and the pelvis and can be a source of pain in the lower back or buttock area.

The joint may be injected with a local anesthetic and corticosteroid when the physician suspects that the sacroiliac joint is the source of the pain.

These injections do not treat a herniated disc itself; instead, they target pain originating from the sacroiliac joint.

6. Trigger Point Injections

Trigger point injections are not administered into the spinal column. Instead, they target specific muscles and surrounding soft tissues.

They may contain a local anesthetic or other medications, depending on the patient's condition and the physician's assessment.

These injections may be used when pain is associated with muscle tension, spasms, or localized tender points within the muscles.

Spinal Injections and Their Uses

They are used in some cases of pain associated with:

• Muscle spasms.

• Tender, tight areas within the muscles (trigger points).

• Certain cases of neck or back pain caused by muscle strain or tension.

7. Vertebral Injection Procedures for Certain Fractures

There are interventional procedures used in selected cases of vertebral compression fractures, particularly some fractures associated with osteoporosis. The main procedures include:

• Vertebroplasty: A special medical bone cement is injected into the vertebral body to help stabilize the vertebra and reduce pain.

• Kyphoplasty: A small balloon is inserted into the vertebra and inflated in some cases before the medical cement is injected.

These procedures are different from corticosteroid injections used to relieve nerve-related pain. They are performed only after evaluating the condition, determining the cause of the fracture, and assessing whether the procedure is appropriate for the patient.

How Are Spinal Injections Performed?

The technique varies depending on the type of injection, the location of the pain, and the purpose of the procedure. Most of these procedures are performed by a physician specializing in pain management, anesthesiology, or interventional radiology, usually with imaging guidance such as X-ray or CT scanning to help accurately guide the needle to the targeted area.

1. How Is an Epidural Steroid Injection Performed?

There are several approaches to epidural steroid injections. The physician selects the most appropriate technique based on the patient's condition and the location of the problem.

A. Interlaminar Approach

This approach is intended to deliver medication into the epidural space surrounding the nerve roots.

It is generally performed as follows:

• The patient lies face down.

• The skin is thoroughly cleaned, and the injection site is numbed with a local anesthetic.

• The physician identifies the appropriate spinal level using imaging.

• A thin needle is inserted between the vertebral laminae until it reaches the epidural space.

• The physician confirms the position of the needle and may inject a small amount of contrast dye to verify that it is in the correct location.

• The medication is injected, which may consist of a corticosteroid combined with a local anesthetic.

• The needle is removed and a small bandage is placed over the injection site.

The procedure usually takes a short time. The patient may experience a brief needle prick, pressure, or mild discomfort during the injection.

B. Transforaminal Approach

With this approach, the needle is directed toward the area surrounding a nerve root at the foramen, the opening through which the nerve exits the spinal column.

It is particularly useful when pain follows the path of a specific nerve, as can occur in some cases of sciatica.

The physician uses imaging to identify the location of the nerve and carefully guides the needle to the targeted area. After confirming the needle's position, the medication is injected near the nerve root.

C. Caudal Approach

With this approach, the needle is not inserted between the vertebrae. Instead, it is introduced through an opening in the lower part of the sacrum to access the epidural space.

This approach may be used in certain cases where accessing the target area from higher spinal levels is difficult or when there are multiple problems affecting the lower spine.

2. Selective Nerve Root Block

This type of injection is used to target a specific nerve root. It may be performed either to treat pain or to help identify which nerve is responsible for the patient's symptoms.

The procedure is generally performed as follows:

• The patient lies face down.

• The physician identifies the appropriate nerve level using X-ray or other imaging.

• The skin at the needle insertion site is numbed with a local anesthetic.

• The needle is guided toward the area surrounding the targeted nerve root.

• A small amount of contrast dye may be used to confirm the needle's position.

• A local anesthetic is injected, and a corticosteroid may be added depending on the patient's condition.

• The patient is monitored for a short period after the procedure.

It is important to emphasize that the medication is injected near the nerve root, not into the nerve itself.

3. Facet Joint Injection

These injections target the facet joints located at the back of the vertebrae. These joints can be a source of neck or lower-back pain.

The procedure is generally performed as follows:

• The patient lies face down.

• The physician identifies the targeted facet joint using imaging.

• The skin is numbed with a local anesthetic.

• The needle is guided into the facet joint.

• The position of the needle is confirmed, and contrast dye may be used when necessary.

• A local anesthetic combined with a corticosteroid is injected.

• The needle is removed and a bandage is placed over the injection site.

One or more facet joints may be injected depending on the suspected source of the pain and the patient's condition.

4. Medial Branch Block

This procedure differs from a facet joint injection because the medication is not injected directly into the joint. Instead, the needle is directed toward the small nerves called the medial branches, which transmit pain signals from the facet joints.

The procedure generally includes:

• Identifying the level of the targeted nerves using imaging.

• Numbing the skin with a local anesthetic.

• Inserting the needle into the area near the nerve.

• Injecting a small amount of anesthetic; corticosteroids may be used in some cases.

• Assessing the degree of pain relief after the injection.

This procedure is often used for diagnostic purposes. If there is significant but temporary pain relief, this may indicate that the facet joint is one of the sources of the pain.

In some cases, the physician may subsequently recommend radiofrequency ablation (RFA) to reduce the nerve's ability to transmit pain signals.

5. Sacroiliac (SI) Joint Injection

This type of injection targets the sacroiliac joint, which is located where the sacrum connects to the pelvis. This joint can be a source of lower-back or buttock pain.

The procedure is generally performed as follows:

• The patient lies face down.

• The physician identifies the joint using imaging.

• The skin is numbed with a local anesthetic.

• The needle is guided into the joint.

• A small amount of contrast dye may be injected to confirm the position of the needle.

• A local anesthetic and corticosteroid are injected, depending on the patient's condition.

• The needle is removed and the injection site is covered.

This injection does not target a herniated disc. Instead, it is used when the pain is believed to originate from the sacroiliac joint.

6. Trigger Point Injections

Trigger point injections differ from injections that target the spine or nerves because they are performed inside the muscles and surrounding tissues of the spine.

When a specific painful or tight area of muscle is present, the physician may:

• Identify the most painful area or trigger point.

• Clean the skin.

• Insert a small needle into the muscle.

• Inject a local anesthetic. Other medications may be used depending on the condition.

• Remove the needle and apply a bandage if necessary.

The patient may feel a brief needle prick or a short muscle twitch during the procedure.

7. Vertebroplasty

Vertebroplasty differs from corticosteroid injections and is used in selected cases of vertebral compression fractures.

The procedure is generally performed as follows:

• Local anesthesia is administered, and sedation may be used in some cases.

• The patient lies face down.

• The affected vertebra is identified using imaging.

• A needle or specialized instrument is inserted into the vertebral body.

• Its position is carefully confirmed.

• Medical bone cement is slowly injected into the vertebra.

• The distribution of the cement is monitored using imaging.

• The needle is removed after the procedure is completed.

The goal of the procedure is to stabilize the vertebra and reduce fracture-related pain in appropriate cases.

8. Kyphoplasty

Kyphoplasty is similar to vertebroplasty but includes an additional step.

The procedure generally involves:

• Inserting a specialized instrument into the affected vertebral body.

• Inserting a small balloon inside the vertebra.

• Carefully inflating the balloon to create a cavity within the vertebral body. In some cases, this may help restore part of the vertebral height.

• Deflating and removing the balloon.

• Filling the resulting cavity with medical bone cement.

• Monitoring the distribution of the cement using X-ray imaging.

The choice of this procedure depends on the type of fracture, the condition of the vertebra, and the physician's assessment.

What Does the Patient Feel During a Spinal Injection?

During most nerve and joint injection procedures, the patient remains awake and may experience some normal sensations, such as:

• A mild needle prick when the local anesthetic is administered.

• A feeling of pressure as the needle is advanced.

• Brief pain or a sensation that radiates into the leg or arm when the needle approaches the nerve area.

• Temporary warmth or pressure when the medication is injected.

The intensity of these sensations varies from one person to another and from one procedure to another.

Risks of Spinal Injections

The risks of spinal injections vary depending on the type of procedure and its location, whether in the neck or lower back, as well as the needle-guidance technique, the medication used, and the patient's overall health.

Although most of these procedures are performed safely when the appropriate patient is selected and modern techniques are used, they may be associated with certain side effects and potential complications.

Common and Temporary Risks

Some temporary symptoms may occur after different types of spinal injections, including:

• Mild pain or a temporary increase in back or neck pain during the first few hours or days after the injection.

• Mild pain or bruising at the needle insertion site.

• Numbness or a feeling of heaviness in the arm or leg due to the effect of the local anesthetic.

• Headache, particularly if a cerebrospinal fluid (CSF) leak occurs.

• Dizziness or a temporary drop in blood pressure.

• Facial flushing or a sudden sensation of warmth.

• A temporary increase in blood glucose levels, which is particularly important for people with diabetes.

• Temporary sleep disturbances or mood changes due to the effects of corticosteroids.

These symptoms are usually temporary and improve within a short period. However, the physician should be informed if they are severe or last longer than expected.

Less Common but More Serious Complications

1. Infection

An infection may develop in the skin or tissues surrounding the injection site. Rarely, the infection may spread to deeper structures around the spine.

Signs that require prompt medical evaluation include:

• Fever or chills.

• Increasing redness or swelling at the injection site.

• Severe or worsening pain.

• Discharge from the needle insertion site.

2. Bleeding or Hematoma

The risk of bleeding may be higher in people who take blood-thinning medications or have blood-clotting disorders.

In rare cases, a collection of blood near the nerves or spinal cord may compress the nervous tissue and cause serious complications.

Therefore, the physician should be informed about all medications the patient is taking, especially anticoagulants and other blood-thinning medications. Patients should not stop any medication on their own.

3. Nerve Irritation or Injury

Temporary nerve irritation may occur, and in rare cases, nerve injury may develop, potentially causing:

• Increased pain.

• Numbness or tingling.

• Weakness in certain muscles.

Permanent nerve injury is a rare complication, but it is one of the risks that should be discussed with the physician before the procedure.

4. Puncture of the Membrane Surrounding the Spinal Cord

In some cases, the needle may reach the membrane surrounding the spinal cord, which can result in a cerebrospinal fluid leak.

One of the most characteristic symptoms is a severe headache that becomes worse when standing or sitting and improves when lying down.

5. Very Rare Neurological or Vascular Complications

These risks are particularly important with certain types of injections, especially procedures performed near nerves and blood vessels in the neck.

In very rare cases, a blood vessel may be injured, or medication may enter an unintended location, potentially causing serious neurological complications.

For this reason, physicians use appropriate imaging techniques and precise injection methods to minimize these risks as much as possible.

Potential Side Effects of Corticosteroids

When an injection contains corticosteroids, temporary side effects may include:

• Increased blood glucose levels.

• A temporary increase in blood pressure.

• Sleep disturbances.

• Mood changes.

• Facial flushing and a sensation of warmth.

Repeated corticosteroid injections at short intervals or over a prolonged period may increase the risk of systemic corticosteroid effects, including effects on bone health, the immune system, and adrenal gland function.

Therefore, the number of injections and the interval between them should be determined by the physician based on the patient's condition and treatment needs.

When Should Immediate Medical Attention Be Sought?

Urgent medical care should be sought if any of the following symptoms occur after the injection:

• New or worsening weakness in an arm or leg.

• Loss of bladder or bowel control.

• Loss of sensation in the area between the thighs.

• Severe or unusually worsening pain.

• Fever or chills.

• Severe and persistent headache, especially if it becomes worse when standing or sitting.

• Difficulty breathing or swelling of the face or tongue, which may indicate a severe allergic reaction.

Important Advice Before and After a Spinal Injection

If you are preparing to undergo a spinal injection to relieve back or neck pain or sciatica, it is important to follow several recommendations that can help ensure the procedure is performed safely and maximize the potential benefit of treatment.

First: Advice Before a Spinal Injection

• Inform your physician about all medications and supplements you take, especially blood thinners, diabetes medications, and blood-pressure medications.

• Do not stop taking blood-thinning medications on your own. Your physician will determine whether they need to be stopped or adjusted and when this should be done.

• Tell your physician if you have an allergy to any medication or to contrast agents used during certain imaging procedures.

• Inform your physician if you currently have a fever, infection, or active inflammation before undergoing the injection.

• If you have diabetes, ask your physician how to monitor your blood glucose after the injection, as corticosteroids may temporarily increase blood sugar levels.

• Bring your MRI scans, X-rays, and previous medical reports, as they may help the physician identify the appropriate area for injection.

• Clearly ask your physician about the type of injection, the injection site, its purpose, expected benefits, and potential risks, because the term "spinal injection" refers to several different procedures.

Second: Advice During the Injection

• Make sure the injection is performed by a qualified specialist. Appropriate imaging guidance should preferably be used to accurately determine the needle's position when required for the specific procedure.

• Immediately inform the physician if you experience severe or unusual pain, sudden numbness, or weakness while the needle is being inserted.

• Do not hesitate to ask about the name of the medication being used, why it was selected, and the dose that will be administered.

Third: Advice After a Spinal Injection

• Follow your physician's instructions regarding rest, movement, and returning to daily activities.

• You may experience localized pain or a temporary increase in pain after the injection. This does not necessarily mean that the treatment was unsuccessful.

• Avoid strenuous physical activity or heavy lifting for the period specified by your physician.

• If you have diabetes, monitor your blood glucose more frequently after an injection containing corticosteroids, according to your physician's instructions.

• Do not repeat injections at short intervals on your own. The physician should determine the number of injections and the interval between them based on the type of injection, your condition, and your response to treatment.

Signs Requiring Urgent Medical Evaluation

Urgent medical evaluation should be sought if any of the following symptoms develop after the injection:

• New or worsening weakness in the leg or arm.

• Loss of bladder or bowel control.

• Numbness or loss of sensation in the area between the thighs.

• Fever or chills.

• Severe or unusually worsening pain.

• Severe and persistent headache, especially if it becomes worse when standing or sitting.

• Difficulty breathing or swelling of the face or tongue, which may indicate a severe allergic reaction.