Achilles tendon rupture is an injury that affects the back of your lower leg. It mainly occurs in people playing recreational sports, but it can happen to anyone.

The Achilles tendon is a strong fibrous cord that connects the muscles in the back of your calf to your heel bone. If you overstretch your Achilles tendon, it can tear (rupture) completely or just partially. If your Achilles tendon ruptures, you might hear a pop, followed by an immediate sharp pain in the back of your ankle and lower leg that is likely to affect your ability to walk properly. Surgery is often performed to repair the rupture. For many people, however, nonsurgical treatment works just as well.

Although it’s possible to have no signs or symptoms with an Achilles tendon rupture, most people have the feeling of having been kicked in the calf, pain, possibly severe, and swelling near the heel, inability to bend the foot downward or “push off” the injured leg when walking, iinability to stand on the toes on the injured leg, popping or snapping sound when the injury occurs. Your Achilles tendon helps you point your foot downward, rise on your toes and push off your foot as you walk. You rely on it virtually every time you walk and move your foot.

Rupture usually occurs in the section of the tendon situated within 2 1/2 inches (about 6 centimeters) of the point where it attaches to the heel bone. This section might be prone to rupture because blood flow is poor, which also can impair its ability to heal. Ruptures often are caused by a sudden increase in the stress on your Achilles tendon. Common examples include increasing the intensity of sports participation, especially in sports that involve jumping, falling from a height, stepping into a hole. APA