The symptoms of chondromalacia patella are mainly caused by the repeated wear and tear of the cartilage surface of the patella, the symptoms are mainly the following: 1. The pain in the knee joint is obvious when going up and down stairs, and as the disease progresses, the pain symptoms will become more obvious, especially when moving around, and there is no obvious effect on walking on level ground. 4, the pain in the knee joint is strangulated, and the limp or abnormal gait is obvious when moving.