Ligament strain in the leg is a condition in which there is a corresponding contusion or laceration of the ligament, but the ligament as a whole is not ruptured and the stability of the joint is not affected, in which case it requires 3-4 weeks of braking, rest, and supportive symptomatic treatment to recover. Ligament injuries are often the result of acute violence or chronic strain. Mild cases can cause local congestion, edema, and inflammatory reactions, while severe cases can cause ligament tears, resulting in bleeding, hematomas, and corresponding inflammatory reactions. If the ligament is not completely ruptured and the stability of the joint is not affected, conservative treatment can be taken in this case, with appropriate braking and immobilization to prevent continued activity from aggravating the injury. At the same time, symptomatic supportive treatment should be provided, including oral fenbid, oral Tongluo Kaiqiao tablets, and topical creams, such as Jinhuang cream and Yunnan Baiyao aerosol. The purpose of these supportive symptomatic treatment is to play an anti-inflammatory and analgesic role, activate blood circulation and remove blood stasis, which can promote rapid tissue repair, and the ligament injury can only be fully recovered after 3-4 weeks of repair.