Sprains can be determined through symptomatic observation, physical examination, imaging and other ways to determine whether the ligament is ruptured. 1. Symptomatic observation: If ligament rupture occurs after sprain, there will be severe and continuous pain in the local area, accompanied by the restriction of the joints and ligament stopping point, and one side of the ligament will be swollen. 2. Physical examination: after sprain, we can go to orthopedic department for physical examination, if there is ligament rupture, ankle joint drawer test, there will be obvious positive signs. 3. Imaging examination: MRI examination after sprain, if there is ligament rupture, ligament loss of continuity and integrity, ligament body or end point rupture and so on. After the sprain, you need to go to the regular hospital for examination in time, if it is clear that the ligament is ruptured, you need to actively cooperate with the doctor for treatment.