Symptoms of degenerative knee disease include: 1. pain and swelling of the knee joint, which is obvious after activity, especially when climbing hills and stairs. 2. popping of the joint. The knee joint may feel rubbing when moving, and sometimes the sound, rubbing and pain are accompanied. 3. inversion and valgus deformity of the knee joint, that is, O-leg and X-leg, and in the advanced stage, there is also expansion of the joint. 4. weakness of the knee joint and muscle atrophy, mainly quadriceps atrophy. In addition, if a patient has symptoms of degenerative knee disease, he or she needs to seek medical attention in a timely manner to clarify the cause of the disease and carry out treatment.