1. The incidence of osteoarthritis is positively correlated with age. Age is the most risk factor for osteoarthritis, and its incidence is directly proportional to age. It is especially common in women over the age of 45, and about 60% of women over the age of 50 will be affected by osteoarthritis. The higher your weight, the more likely you are to be “favored” by osteoarthritis. This is related to the fact that excessive weight increases the load on the joints and causes changes in the biomechanics of the joints due to changes in posture and gait. Especially the lack of exercise obese people are more likely to suffer from this disease. 3. Genetic factors. The prevalence of osteoarthritis is not the same in different races and populations. 4. Gender factors. The incidence of osteoarthritis is higher in women, and increases significantly after menopause. Therefore, many scholars theorize that osteoarthritis in female patients is related to estrogen. 5, environmental factors. People who often live in a humid, cold environment have a higher number of diseases. 6, the causes of the joint itself. Many people with osteoarthritis of the knee have congenital internal and external knee deformity or patellar subluxation deformity, etc. – if you are always fighting between the two knees when you walk, or if your pants at the knee are often worn out, you should be more alert to the occurrence of osteoarthritis.7. Overuse of the joint. Occupational types of work (miners, field workers, athletes, textiles, etc.) have a high prevalence rate. Studies have shown that residents of buildings without elevators have a higher incidence of knee pain and knee osteoarthritis than residents of bungalows. Carpenters may be more likely to develop elbow arthritis. Just as a cab driver’s car is more likely to be scrapped than a private car used only for commuting to work. This shows that joints should not be overused either. 8. Other. Joint trauma, rheumatoid arthritis, large bone disease, gout, diabetes, scoliosis and other diseases can lead to osteoarthritis of the knee joint.