Get plenty of sunshine, pay attention to cold and dampness, keep warm, and give your knee a good rest. After the pain is relieved, walk slowly on a flat surface once or twice a day for 20 to 30 minutes each time. Try to reduce weight-bearing exercises for the knee joint such as going up and down steps and running to avoid and reduce the wear and tear of joint cartilage. Don’t stay in one position for a long time, and don’t do exercises such as repeatedly flexing and extending the knee joint, rubbing and pressing the patella, and shaking the knee joint blindly. Exercise the quadriceps to make them strong and powerful to reduce knee pain. The specific exercise method suitable for middle-aged and elderly people is: sitting or supine position, straighten the knee joint, tense the thigh muscle, foot to the head dorsiflexion, while tensing the calf muscle, each time adhere to three or four seconds, do 10 times per minute, do three or four minutes in a row. You can do it three or four times a day.