1. How is the wound treated? The wound of arthroscopic knee surgery is just two or more small incisions of less than 1cm, which will be closed by stitches or cosmetic tape after the surgery. After discharge from the hospital, the wound needs to be kept clean and dry and disinfected at a regular hospital or clinic every 3 days or so. Since the incision is located at a movable joint, the stitch removal time is usually extended to about 2 weeks after surgery, and the stitches can be removed or the cosmetic tape can be removed at the hospital. Generally, after 24-48 hours after the stitches are removed, you can take a normal shower without fear of wetting the wound. However, do not take a long bath to soak the newly removed stitches, and do not scrub the wound with a bath towel or remove the scab on the wound. Arthroscopic wounds and trauma in the joint cavity are in the postoperative period of inflammation and edema, so excessive activity stimulation is not conducive to wound healing and edema elimination. During the 2-3 weeks after surgery, it is recommended not to walk or jog too much, nor is it recommended to stand or sit still for long periods of time. Daily necessary walking is possible, and resting can be done in a flat position with the patient elevated on a towel or pillow, which is beneficial to the swelling of the knee joint. However, post-operative rehabilitation is also a very important part. The rehabilitation exercise here is not to run as we think, but to do scientific rehabilitation training for joint mobility, lower limb strength, gait and proprioception (such as balance and other functions), specific rehabilitation exercise recommendations will be launched subsequently. 2.Does the joint need ice or heat? First of all, we need to understand the role of ice and heat. Ice can be a good means of analgesia, for example, we see that after a player is injured on the soccer field, the team doctor will spray aerosol on the affected area, this aerosol is actually a low-temperature refrigerant, by quickly reducing the temperature of the affected area, to achieve the purpose of analgesia. Also icing is a good means of eliminating inflammation and allowing the affected recovery period through low temperature, which may require different options in different cases. If there is significant local redness and swelling of the knee joint, hot skin, more fluid and painful symptoms, or swelling of the knee joint after doing rehabilitation, it is recommended to ice the knee for half an hour after elevating the affected limb in a flat position. If there is no obvious discomfort and redness in the knee joint, you can use hot compresses to promote recovery. 3. What else can I do? After the wound is removed, you can do massage on the local scar and soft tissues around the knee to promote the softening of the scar and increase the elasticity of the local tissues. The mobility of the patella should not be neglected, so you can do left and right up and down nudges of the patella every day to help restore the function of the lower limb. In order to avoid the formation of chronic inflammation and chronic pain syndrome, some non-steroidal drugs can be insisted on for 2-4 weeks after surgery, which can help eliminate the inflammatory response of the knee joint and reduce the pain, and also help to carry out normal rehabilitation exercises after surgery. 4. About the follow-up examination. It is quite important to follow up regularly according to the time ordered by the doctor at the time of discharge. The surgeon will combine the intraoperative situation with the postoperative recovery to give the patient some suggestions to help the patient recover better. Some tests will also be done to determine the recovery if necessary. If there is persistent swelling and pain after surgery that keeps getting worse, or if there are still symptoms such as interlocking and popping, you should visit your doctor promptly to find out the cause.