In the acute stage of old dorsalis pedis tendon sprain, ice compresses and then hot compresses are needed, cast immobilization is needed for ankle instability, tendon grafting is needed for repetitive sprains, and reset is needed for combined fracture. 1. Acute sprain: old dorsalis pedis tendon severe sprain is usually a severe sprain of the ankle. If it is in the acute stage, ice packs should be applied for 72 hours to inhibit swelling; hot packs should be applied after 72 hours to promote blood circulation and eliminate swelling. 2. Ankle instability: If the ligament near the ankle joint is damaged or loose after sprain, it can be immobilized by plaster for 2~3 weeks; if the ligament is completely torn, then surgical treatment and prolonged immobilization time should be considered. 3. Repeated sprains: If the ankle is sprained repeatedly, it is considered that the repeated sprains are caused by laxity of tendons and ligaments, and the ankle joint can be stabilized through tendon reconstruction and tendon tightening. 4. Combined fracture: severe sprains can lead to avulsion fracture, in this case, it is necessary to manipulate or surgical incision to reset, and then use internal fixation and plaster external fixation. In the case of severe sprains of the dorsalis pedis tendon, early and standardized treatment is recommended to minimize the adverse effects of the disease.