Achilles Tendonitis

Also Known As: Achilles Tendonitis, Achilles Tendinopathy, Achilles Tendon Inflammation, Insertional Achilles Tendinitis

The Achilles tendon is the largest and strongest tendon in the body. It plays a critical role in walking, running, jumping, and rising onto the toes by connecting the calf muscles to the heel bone.

Because the tendon absorbs significant stress during daily activities and athletic participation, it is susceptible to overuse injuries. Achilles tendinitis develops when repetitive stress causes irritation and inflammation within the tendon. At Fox Valley Orthopedics, we provide personalized treatment plans designed to relieve pain, promote healing, and help patients return to the activities they enjoy.

What Is Achilles Tendinitis?

Achilles tendinitis is an overuse injury that causes inflammation and degeneration of the Achilles tendon. The condition often develops when repetitive strain exceeds the tendon’s ability to recover.

The Achilles tendon is essential for:

Walking
Running
Jumping
Climbing stairs
Athletic performance
Maintaining balance during movement

When the tendon becomes irritated, simple activities that were once painless can become increasingly uncomfortable.

What Types of Achilles Tendinitis Are There?

Several forms of Achilles tendon injuries can occur.

Non-Insertional Achilles Tendinitis

Non-insertional Achilles tendinitis affects the middle portion of the tendon, typically several inches above the heel bone. This condition is more common in younger and highly active individuals.

Insertional Achilles Tendinitis

Insertional Achilles tendinitis occurs where the tendon attaches to the heel bone. This condition can affect both active individuals and less active adults.

Chronic Achilles Tendinopathy

If symptoms persist over time, the tendon may undergo degenerative changes known as tendinopathy. This condition may involve thickening, weakening, and reduced healing capacity within the tendon.

What Causes Achilles Tendinitis?

Achilles tendinitis most commonly develops as a result of repetitive stress on the tendon.

Common causes include:

Sudden increases in exercise intensity
Running longer distances than normal
Repetitive jumping activities
Sports involving sprinting and cutting movements
Tight calf muscles
Inadequate stretching
Improper footwear
Running on uneven surfaces
Poor training techniques
Flat feet or abnormal foot mechanics

The condition frequently affects runners, basketball players, tennis players, and other athletes who place repeated stress on the tendon.

What Are the Symptoms of Achilles Tendinitis?

Symptoms often begin gradually and worsen with continued activity.

Common signs and symptoms include:

Pain along the back of the ankle
Pain above the heel
Morning stiffness
Tendon tenderness
Swelling around the tendon
Pain during running or exercise
Discomfort when climbing stairs
Thickening of the tendon
Reduced flexibility
Increased pain after physical activity

Many patients notice that symptoms improve with rest but return once activity resumes.

How Is Achilles Tendinitis Diagnosed?

Diagnosing Achilles Tendinitis begins with a comprehensive orthopedic evaluation, ideally by a foot and ankle specialist.

Diagnostic evaluation may include:

Review of symptoms and medical history
Physical examination
Assessment of walking mechanics
Evaluation of calf flexibility
Range-of-motion testing
Palpation of the Achilles tendon
X-rays to identify bone spurs
Ultrasound imaging
MRI scans when tendon damage is suspected

Advanced imaging may be recommended to evaluate the severity of tendon injury and rule out partial tears.

How Is Achilles Tendinitis Treated?

Treatment focuses on reducing inflammation, promoting healing, and preventing further tendon damage.

What Nonsurgical Treatments Are Available for Achilles Tendinitis?

Most patients improve with conservative treatment.

Nonsurgical treatment options may include:

Activity modification
Rest
Ice therapy
Anti-inflammatory medications
Physical therapy
Stretching exercises
Eccentric strengthening programs
Heel lifts
Orthotics
Supportive footwear
Walking boots in severe cases

Structured rehabilitation is often one of the most effective treatments for restoring tendon health and preventing recurrence.

When Is Surgery Recommended for Achilles Tendinitis?

Surgery may be recommended when:

Symptoms persist despite months of conservative treatment
Significant tendon degeneration is present
Bone spurs contribute to irritation
Chronic pain limits function
Partial tendon damage progresses

Surgical options may include:

Removal of damaged tendon tissue
Debridement procedures
Bone spur removal
Tendon repair or reconstruction
Tendon transfer procedures

The appropriate treatment depends on the severity of the condition and the patient’s activity goals.

What Does Achilles Tendinitis Recovery Look Like?

Recovery depends on the severity of symptoms and the treatment approach that the patient and doctor mutually decide upon.

Many patients improve within weeks to months through activity modification and physical therapy. Full recovery often requires patience and a gradual return to activity.

Recovery may include: