Heel Tendonitis (Tenosynovitis): Causes, Symptoms, and Treatment

Explained by a Foot and Ankle Specialist (DPM)

As a foot and ankle specialist, heel pain is one of the most common complaints I see.
While many patients assume it is plantar fasciitis, some cases are actually related to tendon inflammation around the heel, often referred to as tendonitis or tenosynovitis.

What Is Heel Tendonitis?

Heel tendonitis typically involves inflammation of the Achilles tendon or surrounding tendon sheath.
This tendon connects the calf muscles to the heel bone and plays a critical role in walking and movement.

When the tendon or its sheath becomes irritated, pain develops in the back or around the heel.

Common Causes of Heel Tendonitis

   Overuse and Repetitive Stress

Activities such as walking, running, or standing for long periods can overload the tendon.
Repeated stress is the most common cause. :contentReference[oaicite:0]

   Improper Footwear

Shoes without proper cushioning or support increase pressure on the heel and tendon.

   Tight Calf Muscles

Limited flexibility in the calf muscles places additional strain on the Achilles tendon.

   Sudden Increase in Activity

A rapid increase in exercise intensity or duration can trigger inflammation.

Symptoms of Heel Tendonitis

  • Pain at the back of the heel
  • Swelling or thickening of the tendon
  • Stiffness, especially in the morning
  • Pain that worsens with activity

If untreated, the condition may progress and increase the risk of tendon injury or rupture. :contentReference[oaicite:1]

How Is It Different from Plantar Fasciitis?

  • Plantar Fasciitis: Pain under the heel (bottom)
  • Tendonitis: Pain behind the heel (back side)

Plantar fasciitis is the most common cause of heel pain, but tendon-related pain should not be overlooked. :contentReference[oaicite:2]

Treatment Options

   Conservative Treatment

  • Rest and activity modification
  • Ice therapy
  • Anti-inflammatory medications
  • Supportive footwear or heel lifts

   Physical Therapy

Stretching and strengthening exercises for the calf and Achilles tendon are essential.

Advanced Treatment

In chronic cases, treatments such as injections or specialized therapy may be considered.
Surgery is rarely required.

When Should You See a Specialist?

  • Pain lasts more than 2 weeks
  • Swelling continues or worsens
  • Walking becomes difficult

Final Thoughts

Heel tendonitis is a common but often misdiagnosed condition.
Early treatment can prevent chronic pain and serious complications.