For the situation of knee pain after menstruation, it is mainly caused by the cold or abnormal wear and tear of the knee joint during menstruation. After this situation, you must pay more attention to warmth, avoid cold, avoid repeated knee flexion and extension activities, and squatting activities, so as not to cause excessive friction of the knee joint, which will cause the degeneration of the cartilage inside the knee joint, as well as cartilage fracture, or even peeling off of the situation, which will exacerbate the pain in the knee joint. At the same time, hot compresses can be applied to the knee joint to promote the circulation of blood in the knee joint, promote the recovery of pain, and promote the recovery of damaged cartilage. Oral cartilage nutritional drugs can be taken to slow down the degeneration of cartilage, which can promote the recovery of cartilage damage. If necessary, intra-articular injection of nutritional lubricant sodium hyaluronate can be carried out to completely restore the pain in the knee joint, and it can also significantly slow down the degeneration of the knee joint.