Achilles Tendon Rupture
A tear of the strong tendon connecting the calf to the heel
Quick Facts
- Type: Tendon injury
- Common trigger: Sudden push-off or pivot in sports
- Classic sign: A pop and sudden calf or heel pain
- Recovery: Weeks to months, with rehab
Overview
The Achilles tendon is the thick, strong band that connects the calf muscles to the heel bone. It allows you to point your foot down, push off when walking or running, and rise onto your toes. An Achilles tendon rupture is a tear of this tendon, which can be partial or complete.
Ruptures often happen suddenly during sports or activities that involve quick acceleration, jumping, or pivoting, and they are common in people who play recreational sports occasionally. A complete rupture usually causes sudden pain and difficulty walking, and many people describe feeling a snap or pop. With proper treatment and rehabilitation, most people recover well, though it takes time.
Symptoms
The symptoms of a rupture usually come on suddenly:
- A sudden, sharp pain in the back of the ankle or calf, sometimes described as being kicked or hit
- A popping or snapping sensation at the moment of injury
- Difficulty walking, especially pushing off or standing on the toes
- Swelling and bruising near the heel
- A gap or dent that can sometimes be felt in the tendon above the heel
- Weakness when pointing the foot downward
Some people are surprised by how little pain they have after the initial injury, even though the tendon is fully torn.
Causes
An Achilles rupture occurs when the tendon is stretched beyond its strength, usually during a forceful movement. Common situations include:
- Sudden push-off: Sprinting, jumping, or quick changes in direction in sports.
- Pivoting or stumbling: An awkward step, a fall, or stepping into a hole.
- Landing hard: Coming down from a jump.
Ruptures are more likely when the tendon is already weakened by age, previous Achilles problems such as tendinitis, certain antibiotics, or steroid injections near the tendon.
Risk Factors
- Age between about 30 and 50, especially in occasional athletes
- Male sex, which carries a higher risk
- Sports involving running, jumping, and quick pivots
- Previous Achilles tendinitis or tendon problems
- Certain antibiotics (fluoroquinolones) or steroid injections near the tendon
- Suddenly increasing activity after a period of inactivity
Diagnosis
A rupture is often diagnosed from the story of the injury and an examination:
- Physical exam: Feeling for a gap in the tendon and testing the foot's movement.
- Calf-squeeze test: Squeezing the calf normally makes the foot point down; if it does not move, the tendon is likely torn.
- Ultrasound or MRI: Imaging used to confirm the tear and judge whether it is partial or complete.
Treatment
Treatment depends on the severity of the tear, your activity level, age, and overall health. Both nonsurgical and surgical approaches can work well.
- Nonsurgical care: A cast, walking boot, or brace holds the foot pointed down so the tendon ends can heal, followed by gradual rehabilitation.
- Surgery: The torn tendon ends are stitched back together, sometimes preferred for younger or more active people.
- Rehabilitation: Physical therapy after either approach is essential to rebuild strength, flexibility, and balance.
- Gradual return: Activity is increased slowly over months to avoid re-rupture.
Recovery typically takes several months, and a structured rehab program greatly influences the result.
Prevention
- Warm up before exercise and stretch the calf muscles
- Increase the intensity and duration of activity gradually
- Build calf strength with regular conditioning
- Mix high-impact activities with lower-impact ones
- Treat calf or Achilles pain (such as tendinitis) early before it worsens
When to See a Doctor
Seek medical care promptly if you feel a sudden pop in the back of your ankle, especially during sports, or if you suddenly cannot walk normally, push off, or stand on your toes. Get prompt evaluation for:
- Sudden severe pain in the back of the ankle or calf
- A snap or pop at the time of injury
- An inability to point the foot down or bear weight
- A noticeable gap above the heel
Early diagnosis improves the outcome, so it is best not to wait.
Frequently Asked Questions
What does an Achilles tendon rupture feel like?
Many people feel a sudden snap or pop in the back of the ankle, as if they were kicked or struck, followed by pain and difficulty walking. Some are surprised that the pain settles quickly even though the tendon is fully torn, which is why any popping sensation should be checked.
Do I need surgery for a ruptured Achilles tendon?
Not always. Both surgical and nonsurgical treatments can give good results. The best choice depends on your age, activity level, the type of tear, and your overall health. A specialist can help weigh the options with you.
How long does recovery take?
Recovery usually takes several months. People often wear a boot or cast for a number of weeks, then progress through physical therapy to rebuild strength and flexibility. Returning to sport too soon raises the risk of re-rupture, so a gradual approach is important.
Can an Achilles rupture be prevented?
You can lower your risk by warming up, stretching the calves, building calf strength, and increasing activity gradually rather than suddenly. Treating early calf or Achilles pain such as tendinitis also helps protect the tendon.
Why are some antibiotics linked to Achilles ruptures?
A class of antibiotics called fluoroquinolones has been associated with tendon weakening and rupture, particularly the Achilles. If you are taking one and develop tendon pain, stop high-impact activity and contact your doctor.
References
- Mayo Clinic. Achilles tendon rupture.
- American Academy of Orthopaedic Surgeons (OrthoInfo). Achilles Tendon Rupture.
- MedlinePlus, U.S. National Library of Medicine. Achilles tendon rupture.
- National Health Service (NHS). Achilles tendon rupture.