Calf tummy like being hit by a stone is a typical manifestation of Achilles tendon rupture, mostly occurring during strenuous exercise, common in young people or athletes. The Achilles tendon is the most powerful tendon in the human body, formed by the calf gastrocnemius muscle and the flounder muscle tendon downward continuation of the formation of the Achilles tendon, stopping at the heel bone behind the tuberosity. The main function of the Achilles tendon is to keep the ankle in plantarflexion and to maintain balance and stability of the ankle. Achilles tendon rupture can be caused by a direct cut from a sharp instrument, and patients usually have a clear history of trauma, with a wound found on the posterior aspect of the calf. More often, however, it is caused by indirect violence. When the triceps muscle of the calf is contracted with force, it is easy to tear the Achilles tendon or even cause a complete rupture of the Achilles tendon, especially when there is chronic inflammation of the Achilles tendon and improper or overly strenuous exercise is more likely to lead to Achilles tendon rupture. Indirect violence-induced Achilles tendon rupture has typical manifestations: it often occurs during strenuous exercise such as sprinting, or falling from a height in an improper landing position; there is an obvious sense of impact on the posterior side of the calf at the time of the injury, and some patients can even hear the rattling sound of the Achilles tendon rupture; followed by swelling, ecchymosis and pain on the posterior side of the calf, and weakness of the calf and the inability to plantarflexion are found when walking. Achilles tendon rupture should be treated with timely surgery, incision or minimally invasive Achilles tendon suture repair, and keep the ankle in plantarflexion position with cast immobilization for 4~6 weeks after surgery. It is recommended that the patient go to the hospital as soon as possible to get a clear diagnosis and treatment as soon as possible.