The Achilles tendon is one of the most powerful tendons in the body, the hamstring as it is called in martial arts movies. It consists of the triceps calf muscle, the gastrocnemius and the flounder muscle. This muscle has three heads, two heads form the front part of this muscle and the gastrocnemius, the flounder muscle is in the deep layer, all three heads down to form a total arch tendon that ends between the heel joints. People rely on him for walking, running and jumping. If the Achilles tendon is completely ruptured, it will be difficult to walk. Legend has it that in ancient times both sides of the Achilles tendon were cut off as a form of punishment, and if not handled properly, prolonged healing of the Achilles tendon would occur, which in severe cases would result in the inability to lift the heel or even limp. Achilles tendon rupture is a common sports injury, one is: a direct cut by something sharp, usually accompanied by skin damage or fracture, the ruptured tendon can be seen through the wound, this is called open Achilles tendon rupture. The second type is: when the Achilles tendon is under tension, it is ruptured by a lateral smash or due to a sudden violent contraction of the muscle, commonly seen in athletes and actors. In this case, the skin often remains intact and is called a closed Achilles tendon rupture. There is another kind: it is the Achilles tendon due to long-term chronic injury or after cortisone injection resulting in malnutrition of the muscle leg, degenerative changes or calcification of the Achilles tendon, weakening the strength of the Achilles tendon is susceptible to strain and rupture. Athletes, martial arts practitioners and actors perform very strong jumping and stomping movements. If the tolerance capacity is exceeded, the Achilles tendon can be strained, aseptic inflammation can occur around it, and the strength can be reduced. The Achilles tendon can be pulled by the muscle when the movement is uncoordinated, or when too much force is exerted. The main symptoms and signs of Achilles tendon rupture: 1, the main symptoms (1) pain in the Achilles tendon; (2) the feeling of stick strike; (3) when the patient is injured, he or she or others can hear a crisp ringing sound. 2, the main signs (1) the affected foot can not lift the heel, that is, the affected foot can not lift the heel; (2) the shape of the Achilles tendon disappeared, there is a sense of depression when touched; (3) the skin of the Achilles tendon has a sharp pressure pain, swelling is not significant; (4) rest position, the Achilles tendon lengthening; (5) pinch calf triceps test is positive, the test method is the patient lying prone, both feet placed outside the edge of the bed, with the hand pinch the belly of the calf triceps, the normal side of the ankle joint The normal side of the ankle appears to be plantarflexed, while the ruptured side of the Achilles tendon does not move.