1, slapping the knee can obviously relieve the pain of knee joint caused by various knee joint diseases, and through this method, the blood circulation around the knee joint can be improved, thus achieving a very good effect of dredging meridians and relieving pain.

2. The knee is the body part of the human body, located at the joint of the big leg and the lower leg. The main internal structure of the knee is the meniscus and four ligaments. Meniscus is a crescent-shaped fibrous cartilage tissue at the junction of the lower femur and the upper tibia in the knee joint, which is used to cushion the vibration of the knee joint and avoid direct friction between the two bones. In addition, it is supported by four main ligaments. Two of them are on both sides of the knee, called medial process ligament and lateral process ligament respectively, whose main function is to prevent dislocation of the knee axis; The other two ligaments are distributed in the front and back of the knee, called anterior cruciate ligament and posterior cruciate ligament, to prevent the knee from shifting back and forth.