Patient: I have often sprained my left knee for no reason since I was in my teens, and on July 14 of this year, I sprained my knee again. In mid-August, I went to the hospital and had an x-ray taken, and the bones showed no abnormalities. The doctor told me that it was cartilage tenderness, and since it was not red and swollen, it did not affect movement too much, so I just needed to take care of it, with less activity and less leg bending. I was a college student, I was at home on vacation, so I basically did not move my left leg, it lasted for a week, it did improve, walking does not affect, but still can not go up and down the stairs. September 5, our school started, I went back to Shenyang, because the school started every day to class, walking and climbing stairs became more, did not have a good rest, now walking will have an uncomfortable feeling, up and down the stairs still hurt. I would like to ask you if my condition is chondromalacia? If so, is there any good medicine that can help recover as soon as possible? The X-rays have been seen by a professional doctor and there is no problem. Yan Zuoqin, Department of Orthopedics, Shanghai Zhongshan Hospital: At present, according to the symptoms you mentioned, it does look more like chondromalacia. But since you often sprain for no reason, we suggest you get an MRI to rule out the possibility of joint instability due to ligament damage. Patient: Thank you, doctor, I would like to ask if there is any medicine that can be taken to make the healing process faster if it is chondritis? Yan Zuoqin, Department of Orthopaedics, Zhongshan Hospital, Shanghai, China: Take some glucosamine (Glucophage), Fenbid, etc. The key is to limit activities during the acute period. Also pay attention to the functional exercise of the quadriceps (straight leg raise exercise), which has a certain effect on your knee stability. If you don’t know how, you can go to the rehabilitation department of your local hospital for physical therapy. The orthopedic department of Shanghai Zhongshan Hospital Yan Zuoqin: exercise specific methods: 1. patella massage: hands gently massage around the patella, relaxed hands crossed in front of the knee joint, thumb force inward push pressure. 2. quadriceps functional exercise: straighten the knee joint, force contraction of the thigh muscles, adhere to 5-6 seconds, relax for 5-6 seconds, repeated, twice a day, each time not less than 30 minutes. 3. adductor functional exercise: sitting, feet apart for about 10 minutes. Sitting position, feet apart about 10 centimeters, toes forward, hands clenched fist placed between the knee joints, clench both fists, feel the inner thigh muscle tension, adhere to 5-6 seconds, relax for 5-6 seconds, repeated, twice a day, no less than 30 minutes each time. Functional exercise for 3-6 months. Patient: Thank you, doctor, the advice you gave is very practical, thank you very much!