It does not take two years to recover from a knee injury, and the recovery time is related to the location and extent of the injury, which usually takes up to three months to recover. Knee injuries are more common diseases, including knee meniscus injury, knee ligament injury (the two often occur together), patellar dislocation, tendon rupture and a series of injurious diseases. For knee injury is mild, can be injured immediately after the brake rest, through the anti-inflammatory analgesic relief symptoms, functional exercise, able to 1 ~ 2 months can be recovered. If the injury is serious, resulting in ligament rupture, meniscus injury, patellar dislocation or fracture, surgical treatment is required, and after the fracture healing plus functional exercises, it will take about 3 months to recover. It is recommended that patients with knee injuries should seek medical treatment in a timely manner, so as not to cause joint contracture, joint stiffness and other dysfunctions.