Achilles Tendonitits Causes, Symptoms & Treatment Options
Achilles tendinitis is inflammation of the Achilles tendon, which connects the calf muscles to the heel. It causes pain, swelling, and stiffness, often worsening with activity. Common in runners and athletes, it results from overuse, sudden increases in exercise, or tight calf muscles, and requires rest, stretching, and medical care.
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The Achilles tendon is the largest and strongest tendon in the body, connecting the calf muscles to the heel bone. It plays a crucial role in push-off strength, balance, and generating power during activities such as standing, walking, running, and jumping. Achilles tendinitis occurs when this tendon becomes inflamed, which can happen at the junction between the muscle and tendon, along the tendon itself, or at its attachment to the heel.
Pain and swelling at the back of the heel are common signs of this condition. It is especially frequent in runners, athletes, and individuals who suddenly increase physical activity or have tight calf muscles. Without proper rest, stretching, and treatment, the inflammation can worsen, leading to chronic pain and reduced mobility.
What causes Achilles Tendonitits?
Achilles tendonitis is usually the result of long-term repetitive strain rather than a single injury. It often affects athletes who exercise sporadically, skip proper warm-ups, or increase intensity too quickly without sufficient rest. Aging also increases risk, as the tendon gradually degenerates.
- How the Injury Occurs: The tendon becomes irritated or inflamed when it is repeatedly overstretched or overloaded, especially without proper conditioning, warm-up, or rest.
- Common Everyday Causes: Tight calf muscles, wearing unsupportive shoes, sudden increases in walking, running, or stair climbing, and repetitive movements in daily activities can also trigger Achilles tendonitis.
Sports that involve sudden stops, starts, and directional changes are particularly high risk.
- Tennis: Repeated sprints, lunges, and sudden direction changes strain the Achilles tendon.
- Basketball: Jumping, quick pivots, and sudden stops place heavy stress on the tendon.
- Running: Continuous pounding on hard surfaces or increasing mileage too quickly can inflame the tendon.
- Soccer: Rapid acceleration, deceleration, and kicking motions put repeated stress on the Achilles.
- Bicycling: Overuse or improper bike setup can overwork the calf muscles, stressing the tendons.
- Hiking: Walking on uneven terrain, especially uphill or downhill, increases tendon load.
Symptoms
The common symptom associated with Achilles tendonitis is pain in the back of the leg or ankle, especially in the morning. Pain often worsens with activity. Common symptoms also include:
- Swelling: Puffiness or enlargement at the back of the leg or around the ankle.
- Tenderness: Pain or discomfort when touching the tendon.
- Thickening of the tendon: The tendon may feel larger or firmer than usual.
- Stiffness: Difficulty stretching or moving the tendon, especially after sitting or sleeping.
- Delayed pain: Intense soreness may appear the day after exercise or strenuous activity.
If you experience swelling at the back of the heel alongside these symptoms, it’s crucial to begin rest and recovery as soon as possible.
When to see a doctor
You should see a doctor if you have Achilles pain that doesn’t improve. If the pain is severe and you have trouble walking, you should seek emergency care, as you may have a ruptured achilles tendon instead of achilles tendonitis. During your visit, your doctor will ask questions about your symptoms and physical activity.
A physical examination will be performed to look for heel cord inflammation and to check for signs of rupture of the tendon, tenderness areas, or the tendon’s thickening. You may be asked to stand on the balls of your toes to test your strength. Your doctor may also order imaging tests, such as an X-ray or magnetic resonance imaging (MRI), to confirm the diagnosis and provide the proper Achilles tendonitis treatment.
Non-operative treatment
Non-surgical treatments are usually effective in resolving symptoms associated with Achilles tendonitis, though they may take a few months. Conservative Achilles pain treatment may include:
- Rest from painful sports
- Switching to less strenuous activities that are easier on your Achilles tendon
- Applying ice to the affected area for 20-minute intervals to reduce inflammation; alternating icing with a heating pad may be helpful.
- Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen, are used to relieve pain.
- Night splinting or a walking boot to allow the tendon to heal at the proper length
- Gentle stretching of your calf muscle
- Physical therapy exercises to stretch and strengthen the calf muscles
Try these exercises to help address your condition:
Below is a PDF of the Exercise Program
Surgical Treatment
If Achilles tendonitis does not improve after several months of conservative care, your doctor may recommend surgery. Surgical options can include removing scar tissue, repairing or reinforcing the damaged tendon, lengthening the calf muscle, or addressing other specific issues identified during evaluation.
Recovery
Recovery time varies depending on the severity of the tendon damage. Some athletes may see improvement within days with proper treatment, while others may require weeks or months before returning to full activity. Physical therapy is essential during rehabilitation to restore strength, flexibility, and function, helping prevent future tendon problems.
Dr. Jay Kimmel is a board-certified orthopedic surgeon specializing in sports medicine, arthroscopic surgery, and shoulder and knee disorders. He completed his orthopedic training at New York-Presbyterian/Columbia University Medical Center and a Sports Medicine Fellowship at Temple University.
Dr. Kimmel previously served as the Director of the Connecticut Sports Medicine Institute at Saint Francis Hospital and has held faculty appointments as Clinical Assistant Professor in the Departments of Orthopedics and Family Medicine at the University of Connecticut. He has extensive experience caring for athletes as a team physician for high school and collegiate programs and continues to teach in the athletic training departments at Westfield State University and Springfield College.
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/MonthFrequently Asked Questions
How long does it take to recover from Achilles tendonitis?
Mild cases may improve within a few weeks, while chronic Achilles tendonitis may take several months of physical therapy and rest. If surgery is needed, which is rare, recovery can take 6 months or more.
What are the first signs of Achilles tendonitis?
Early signs include tightness and Achilles pain after exercise, morning stiffness, and noticeable swelling or tenderness at the back of the heel.
What activities should I avoid with Achilles tendonitis?
Avoid high-impact sports or activities that involve sudden stops or jumps, like basketball or running, until healing occurs. These can worsen heel cord inflammation and delay recovery.
Can I continue exercising if I have Achilles tendonitis?
It depends. Low-impact alternatives such as swimming or cycling (if pain-free) may be allowed, but repetitive activities such as running or jumping must be minimized to prevent worsening Achilles tendonitis.