Achilles Tendonitis: Symptoms, Causes, and Best Treatment

Achilles tendonitis is inflammation of the tendon connecting your calf muscles to your heel bone — common in runners and active people, and typically the result of overuse. Left untreated it can become chronic or, in severe cases, lead to a tendon rupture. Caught early, it responds well to treatment.

Recognizing the symptoms

Symptoms usually build gradually and worsen with continued activity:

• Heel pain and stiffness, especially in the morning or after rest.
• Swelling around the tendon, often more visible or worse after exercise.
• Tenderness along the tendon, with pain on pressing the back of the ankle.
• Limited ankle flexibility, making it harder to flex the foot or point the toes.
• Thickening of the tendon from chronic inflammation.
• A cracking or creaking sensation when moving the ankle.

What causes it

Achilles tendonitis is usually repetitive strain, but several factors contribute: sudden increases in exercise intensity or mileage; unsupportive footwear without adequate arch support; tight or weak calf muscles that force the tendon to work harder; flat feet or high arches that add strain; improper running mechanics such as overpronation; the natural loss of tendon elasticity with age; and conditions like rheumatoid arthritis, diabetes, or obesity that increase inflammation and slow healing. Identifying which of these applies to you is what actually shapes an effective treatment plan.

Treatment options, from conservative to surgical

Most cases respond to a conservative approach, escalating only if needed:

• Rest and activity modification — reducing aggravating activity while low-impact exercise like swimming or cycling maintains fitness.
• Ice therapy — 15–20 minutes several times a day to reduce swelling and pain.
• Stretching and strengthening — calf stretches and eccentric heel drops relieve tension and build tendon strength.
• Orthotics and supportive footwear — reduces strain, especially for flat feet or high arches.
• NSAIDs — for pain and inflammation, under medical guidance.
• Physical therapy — a structured program to rebuild flexibility, strength, and mechanics.
• Shockwave therapy — a non-invasive option that stimulates blood flow and accelerates healing.
• PRP injections — concentrated platelets from your own blood, injected to promote tissue repair in chronic cases.
• Immobilization — a walking boot or brace for more severe injuries.
• Surgery — reserved for cases that don't respond to conservative care, or for a torn tendon.

Preventing it from coming back

Increase exercise intensity gradually, keep calf muscles flexible and strong with regular stretching, wear supportive footwear, use orthotics if your foot mechanics call for them, and treat early pain as a signal to rest rather than push through.