The incidence of knee degeneration is significantly higher in female patients than in male patients, which is obviously related to the special physique of female patients and is mainly reflected in the following aspects: 1, the posterior tilt of the pelvis changes after childbirth, which will increase the load on the knee joint; 2, the female pelvis is larger than that of males, which will increase the load on the medial side of the knee joint; 3, the hormone of female body decreases rapidly after the menopause, which results in the atrophy of the articular chondrocyte cells and shedding, and the chance of chondromalacia patella will increase; 4, women are more susceptible to cold and chills by nature. The incidence of chondromalacia patella will increase; 4, women love beautiful nature dress more vulnerable to cold, cold and so on. Women usually pay attention to the protection of the knee joint, keep warm and try to avoid going up and down the stairs, climbing, downhill and other weight-bearing action.