If the knee wound has healed but the swelling has not gone down, it is considered to be caused by physiological factors such as excessive exercise, or it may be caused by pathologic factors such as incomplete recovery from the injury and joint infection, and general treatment, physical therapy and medication can be given according to the cause of the disease for recovery. 1. Physiological factors: due to excessive exercise or early activity, which can lead to inflammatory exudation of soft tissues around the knee joint and cause swelling, the patient should rest more, reduce the amount of activity, and then moderate exercise after the swelling has subsided. 2. Injury is not recovered: usually the lower limb suture wound can be healed in 10~14 days, while the soft tissues around the knee joint need a longer time to recover due to more blood seepage and inflammatory exudation. Physiotherapy such as hot compresses and ultrashort wave can be chosen to promote blood circulation and inflammatory absorption, and reduce the swelling. 3. Joint infection: Infection can lead to redness, swelling, heat and pain in the joint area, local braking is recommended, and antibiotic treatment, such as cephalosporin, is prescribed for anti-infection treatment, and surgery may be needed if necessary. If the knee wound has healed but the swelling has not subsided, it is recommended that the patient consult a doctor in time to find out the cause and then carry out targeted treatment, so as not to delay the condition.