Achilles tendonitis causes symptoms and treatment methods

Achilles tendonitis is a common problem that causes severe pain behind the heel or at the lower part of the leg, affecting walking, sports, and even everyday activities. The main cause is usually repetitive strain on the tendon, sudden increases in activity, or wearing inappropriate footwear. In some cases, it may result from a partial tear or a bone spur.The good news is that most cases of Achilles tendonitis improve with conservative treatment, such as rest, specific stretching and strengthening exercises, and medications to reduce pain and inflammation. Surgery is usually considered a last resort for chronic cases or when there is a complete tendon tear or a bone spur causing severe pain.In this Dalily Medical article, we will cover the symptoms of Achilles tendonitis, its causes, different treatment methods from exercises and medications to surgery, the expected recovery period, and prevention tips to avoid recurrence.

What is Achilles Tendonitis?

Achilles tendonitis is inflammation or strain in the Achilles tendon, which connects the calf muscles to the heel bone. The inflammation can be superficial around the tendon or within the tendon itself.

Is Achilles Tendonitis Always Painful?

Pain usually appears after physical activity, such as running or long walks.
In chronic cases, the pain may persist even at rest, especially if the tendon is swollen or thickened.

Is Achilles Tendonitis Only Common Among Athletes?

No, it’s not limited to athletes, although they are more prone due to running, football, or basketball.
It can affect anyone who suddenly increases their activity or older adults due to tendon stiffness.

Can You Return to Sports Immediately After Injury?

No, an initial rest period with stretching and tendon-strengthening exercises is required.
Returning too early can worsen the inflammation or even cause a tendon rupture.

Can Achilles Tendonitis Heal Without Surgery?

Yes, most cases improve with conservative treatment, including:

Rest and reduced activity
Stretching and strengthening exercises for the calf
Proper footwear and heel support
Medications to reduce pain and inflammation

Surgery is rare and is reserved for chronic cases or complete tendon tears.

Can the Inflammation Return After Treatment?

Yes, recurrence is possible, especially if the person resumes activity suddenly or neglects preventive exercises.
Consistently performing preventive exercises and using proper footwear greatly reduces the risk of recurrence.

Does Achilles Tendonitis Affect Daily Walking?

Mild cases: Pain usually occurs after long walks or intense activity only.
Chronic cases or after tendon rupture: The inflammation may affect normal walking, stair climbing, and even standing for long periods.

Are Ice or Heat Useful for Achilles Tendonitis?

Ice: Helps reduce pain and inflammation after physical activity.
Heat: Helps loosen the muscles before exercise and prepares the tendon for movement.

Does Inflammation Vary With Age?

Yes, as we age, tendons lose flexibility, making Achilles tendonitis more common after age 30–40.
Older adults need careful stretching and strengthening exercises to avoid tendon rupture.

Does Excess Weight Increase the Risk of Achilles Tendonitis?

Yes, excess weight increases pressure on the Achilles tendon during walking and running.
Maintaining a healthy weight reduces the risk of injury or recurrence.

Duration of Physical Therapy for Chronic Inflammation

Physical therapy typically lasts 6 to 12 weeks for chronic cases and includes:

Stretching and strengthening exercises for the calf and tendon
Balance exercises and massage to improve tendon flexibility
Sometimes, use of heel or tendon support devices

Consistency with the program is key to achieving the best results and reducing recurrence.

Causes of Achilles Tendonitis

Achilles tendonitis occurs due to overuse or inflammation of the tendon connecting the calf muscle to the heel bone. Any inflammation makes walking or running difficult and painful. Main causes include:

Overloading the tendon: Sudden increase in activity, longer or more intense workouts (running long distances, jumping, ball sports).
Weak or stiff calf muscles: Weak or non-flexible muscles put more strain on the tendon. Stiff muscles increase injury risk, especially in older adults or athletes.
Improper footwear: Old, tight shoes or high heels increase tendon pressure.
Sudden changes in activity or surface: Running on hard or sloped surfaces suddenly strains the tendon.
Previous injuries or chronic inflammation: Any prior injury or partial tear increases the likelihood of tendonitis if not fully treated.
Foot problems or gait issues: Flat feet or inward/outward rolling of the foot (pronation/supination) create uneven weight distribution and pressure.
Age: Tendons lose elasticity with age; people over 30–40 are more prone.
Chronic diseases: Rheumatoid arthritis or diabetes affect tendon health.
Medications: Certain antibiotics like fluoroquinolones may weaken or inflame tendons.

Symptoms of Achilles Tendonitis

Pain behind the heel or lower leg: Usually mild after walking or running, but can become constant in chronic cases.
Swelling or thickening: Indicates inflammation or strain.
Stiffness: Tendon or calf muscle may feel tight after long rest.
Warmth or redness: Area around tendon may feel warm or slightly red, especially in acute inflammation.
Popping or stretching sensation: Sometimes a snapping sound or feeling indicates significant strain or partial tear.
Weakness or difficulty walking: Severe inflammation can affect standing on toes or stair climbing.
Pain worsens with activity: Running, jumping, or stair use increases pain; over time, even light activity may cause discomfort.

Types of Achilles Tendonitis

Chronic Achilles Tendonitis:
- Cause: Repeated strain over a long period
- Symptoms: Persistent mild to moderate pain, tendon thickening, difficulty moving after rest
- Common in athletes who suddenly increase activity or people with stiff calf muscles
Acute Achilles Tendonitis:
- Cause: Intense strain or direct tendon injury
- Symptoms: Sharp pain behind heel, rapid swelling, sometimes warmth or redness
- Usually requires rest and short-term treatment
Paratendinitis:
- Cause: Inflammation in the sheath around the tendon, not the tendon itself
- Symptoms: Pain with movement, occasional popping or friction sensation
- Often caused by overuse or improper shoes
Insertional Achilles Tendonitis:
- Cause: Inflammation at tendon insertion on heel bone, sometimes with bone spur
- Symptoms: Pain at heel, difficulty wearing shoes, localized swelling
- Common in older adults or after long-term tendon strain
Achilles Tendon Tear/Rupture:
- Not traditional tendonitis, may occur after chronic inflammation or acute injury
- Symptoms: Sudden pop, severe pain, difficulty walking or standing on toes, major swelling
- Considered an emergency, usually requires surgery or intensive physical therapy

Risks of Achilles Tendonitis

Tendon Rupture:
- Severe complication, often after chronic inflammation or sudden strain
- Symptoms: Sudden intense pain, popping sound, difficulty walking or standing on toes
- Usually requires urgent surgery or intensive rehabilitation
Weakness and reduced mobility:
- Chronic inflammation decreases tendon efficiency in engaging calf muscles, making walking, running, or stair climbing difficult
Permanent swelling or thickening:
- Continuous inflammation can cause persistent tendon thickening, leading to friction and pain during movement or when wearing shoes

4. Bone Spurs

In insertional Achilles tendonitis (where the tendon attaches to the heel), bone spurs may develop, increasing pain and making physical therapy more difficult. In some cases, surgical intervention may be needed.

5. Balance Problems and Difficulty Walking

Persistent pain or tendon weakness can alter the way you walk or stand, causing fatigue in other leg muscles and increasing the risk of falls, especially in older adults.

6. Interference with Daily or Sports Activities

Untreated inflammation may prevent normal physical activity or sports participation, and lengthen recovery time.

Stages of Achilles Tendonitis

1. Early / Initial Stage

Symptoms:

Mild pain behind the heel or lower leg after long walks or physical activity
Slight tendon stiffness after rest, especially in the morning
Usually no obvious swelling

Cause:

Initial tendon strain due to sudden increase in activity or improper footwear

Management:

Reduce activities that strain the tendon
Apply ice packs after exercise
Perform calf muscle stretching exercises

2. Moderate Stage

Symptoms:

More noticeable pain, persisting after activity and sometimes at rest
Mild swelling or thickening around the tendon
Difficulty standing on tiptoes or walking long distances

Cause:

Continued overuse without adequate rest
Weak calf muscles

Management:

Physical therapy including stretching and strengthening exercises
Use supportive shoes or heel pads
Temporarily avoid activities that strain the tendon

3. Chronic / Severe Stage

Symptoms:

Persistent pain even at rest
Significant thickening or knots in the tendon
Major difficulty with movement or climbing stairs
Sometimes accompanied by calcifications at the tendon insertion (Insertional Tendonitis)

Cause:

Prolonged overuse or repeated untreated inflammation

Management:

Intensive physical therapy for the tendon and surrounding muscles
Medical or surgical intervention may be needed if bone spurs or partial tears exist
Complete avoidance of activities that increase tendon load for extended periods

4. Complicated / Rupture Stage

Symptoms:

Sudden, severe pain behind the heel
Popping sound or feeling of tendon tearing
Severe swelling and difficulty walking or standing on tiptoes

Cause:

Long-term chronic inflammation or acute sudden injury

Management:

Often an emergency requiring urgent surgical intervention
Post-surgery: extended physical therapy to restore strength and mobility

Diagnosis of Achilles Tendonitis

1. Medical History and Physical Examination

Patient history: Pain location, onset timing, prior injuries, sudden increase in activity
Physical exam:
- Palpation of tendon for pain or swelling
- Observing stiffness or thickening
- Ankle and foot movement testing for tendon function and pain
- Thompson test: Squeezing calf muscle to check tendon movement and detect rupture

2. X-Ray

Does not show the tendon itself, but important to detect:
- Bone spurs at the tendon insertion
- Bone abnormalities contributing to inflammation

3. Ultrasound

Detects:
- Tendon thickening
- Inflammation in the surrounding sheath (paratenon)
- Partial or complete tendon tears
Advantages: fast, painless, can assess tendon function during movement

4. MRI

Used for chronic or difficult cases
Shows:
- Tendon inflammation
- Partial or complete tears
- Chronic changes like calcifications or bone spurs
Important for planning physical therapy or surgery

5. Strength and Function Assessment

Sometimes tests are done for calf muscle strength, walking, and running to assess how inflammation affects daily activities and sports.

Surgical Treatment of Achilles Tendonitis

Surgery is usually the last option after failed conservative treatment (rest, physical therapy, exercises, supportive shoes) or in cases of partial/complete tendon tear or chronic bone spur.

1. Debridement

Goal: Remove inflamed or damaged tissue around or inside the tendon
Method: Small to medium incision along the tendon; remove damaged tissue and close the wound
When used: Chronic inflammation or persistent pain after physical therapy
Result: Pain relief and improved ankle movement

2. Bone Spur Removal

Goal: Remove bone spurs at the tendon insertion (Insertional Tendonitis)
Method: Surgeon scrapes or removes the spur and reattaches the tendon if necessary
When used: Chronic inflammation with painful bone spurs
Result: Reduced pain, easier walking, improved tendon function

3. Tendon Repair

Goal: Repair partial or complete Achilles tendon tear
Method:
- Partial tear: stitch damaged tendon and remove inflamed tissue
- Complete tear: stitch ends together, sometimes reinforced with another tendon or graft
When used: After acute or chronic rupture causing severe difficulty walking
Result: Gradual restoration of strength and flexibility after physical therapy

4. Tendon Transfer / Graft

Goal: Use another tendon to replace or strengthen the damaged tendon
Method: Tendon from another location in the leg (e.g., foot or calf) is grafted to replace damaged tendon
When used: Very large tear or severe chronic tendon damage
Result: Full tendon function restoration, especially important for athletes

5. Endoscopic Surgery

Goal: Remove inflamed tissue or small bone spurs with minimal invasive surgery
Method: Small incisions with camera and instruments; surgeon removes inflamed tissue or spurs
When used: Chronic cases with localized pain or small spurs
Result: Faster recovery, smaller scars, less post-op pain

Medication Treatment

Medications are mainly used to relieve pain and inflammation, usually as part of a comprehensive plan with rest, exercises, and physical therapy.

1. NSAIDs (Non-Steroidal Anti-Inflammatory Drugs)

Examples: Ibuprofen, Naproxen, Diclofenac
Goal: Reduce pain and inflammation
Use: Oral or sometimes topical gel/cream
Benefits: Reduce pain and swelling, improve mobility for therapeutic exercises
Warnings: Long-term or high-dose use may affect stomach, liver, or kidneys; always use under medical supervision

2. Topical NSAID Creams or Gels

Examples: Diclofenac gel, Ketoprofen gel
Goal: Reduce pain and inflammation locally with fewer systemic side effects
Use: Applied 2–3 times daily on the Achilles area as directed

3. Simple Analgesics

Example: Paracetamol (Panadol)
Goal: Pain relief without major anti-inflammatory effect
Use: For mild inflammation or if NSAIDs are contraindicated

4. Corticosteroid Injections – Use With Caution

Goal: Reduce severe inflammation in chronic cases
Use: Injected around the tendon, not directly into it, to avoid rupture
Warning: Repeated or direct injections may increase tendon rupture risk; only after careful medical evaluation

5. Supplements (Optional)

Goal: Support tendon health
Examples:
- Glucosamine or marine collagen
- Vitamins C and D for tissue support
Note: Supplements alone are not a treatment but may help prevention or recovery

Important Notes:

Medications relieve symptoms but do not treat the root cause. Combine with rest, stretching, proper footwear, or physical therapy.
Always use medications under medical supervision, especially NSAIDs and steroid injections.
If pain persists beyond two weeks despite medication, consult an orthopedic doctor to evaluate surgery or intensive physical therapy.

Exercise Treatment for Achilles Tendonitis

1. Stretching Exercises

Goal: Increase calf flexibility and reduce Achilles tendon strain

a. Gastrocnemius Stretch

Stand facing a wall, injured leg back, heel on the ground
Bend front knee toward wall slowly
Keep back heel on the floor
Hold 20–30 seconds, repeat 3 times

b. Soleus Stretch

Same position, but slightly bend the back knee
Improves deep tendon flexibility and reduces pressure

2. Strengthening Exercises

a. Heel Raises (Standing Calf Raises)

Strengthen Achilles tendon and calf muscles
Stand on tiptoes, raise heel slowly, then lower
Can do single or double leg depending on pain
10–15 reps, twice daily

b. Eccentric Heel Drop

Treat chronic tendonitis and improve tendon strength
Stand on stair edge, rise on toes, then slowly lower heel below step level
10–15 reps, twice daily

3. Balance Exercises

Improve muscular control around the ankle, reduce future injury risk
Stand on one leg for 30 seconds, switch sides, repeat 2–3 times

4. Tendon Massage / Soft Tissue Mobilization

Improve blood flow, reduce tension and stiffness
Massage gently with hand or small ball
Can be combined with stretching before/after activity

5. Dynamic Stretching

Move the tendon and calf rather than static stretch, ideal pre-sports
Stand on tiptoes, lower slowly, repeat 10 times at moderate speed

6. Resistance Band Exercise

Strengthen calf and tendon gradually
Attach band to toes, pull up/down slowly
10–15 reps, 2–3 sets

7. Walking on Toes and Heels

Strengthen leg muscles, improve balance, reduce tendon pressure
Walk 30 seconds on toes, then 30 seconds on heels, repeat 3 times

8. Balance Ball / BOSU Stability Exercise

Improve balance, ankle control, indirectly strengthen tendon
Stand on balance ball or soft pad on one foot for 20–30 seconds, 2–3 sets per foot

9. Manual Achilles Stretch

Increase tendon flexibility, reduce stiffness
Sit, extend leg, gently pull toes toward you
Hold 20–30 seconds, repeat 3 times

10. Gentle Plyometric / Jumping Exercises

Improve tendon endurance and flexibility
Stand on tiptoes, perform small jumps up/down without strain
10–15 reps, once daily initially

Note: Start these exercises after pain improves, usually in the moderate or advanced stages of treatment.