Knee pain is considered to be related to cold or strenuous exercise, trauma, knee arthritis, etc. It is generally not recommended that patients with knee pain exercise blindly, clear knee arthritis can be followed by the doctor’s instructions for knee flexion and extension and strength exercises. 1. Cold or strenuous exercise: if the patient has not paid attention to the knee joint parts of the recent warm, strenuous exercise, easy to induce knee pain phenomenon. For this kind of patients, should not blindly exercise, and usually do not need to exercise. Patients should pay attention to rest, but also through the appropriate way to relieve the pain symptoms of hot compresses. 2. Trauma: when the knee suffers from external impact or fall, burns, easy to appear local pain symptoms, patients can not exercise, otherwise it will aggravate the local pain, swelling and so on. For the trauma caused by the person, should pay attention to rest, early ice packs, late hot packs, etc.. If the local trauma, should cooperate with the doctor to clean up the wound. For patients with knee pain caused by trauma, there is no need to exercise. 3. Knee arthritis: mainly related to obesity, joint instability and other factors. Usually patients need to follow the doctor’s instructions to apply aspirin, ibuprofen and other non-steroidal anti-inflammatory painkillers symptomatic treatment, which can help relieve pain and control inflammation. For those with serious conditions, surgical treatments such as joint cleaning and arthroplasty are feasible. After the surgery, patients need to cooperate with the doctor to do rehabilitation training, mainly knee flexion and extension and strength exercise, in order to promote the return of normal joint function. In daily life, you can also choose swimming, bicycling and other training to help the body recover. It is recommended that patients with knee pain seek medical examination in order to clarify the disease and then treat the cause, should avoid blind exercise, and do not blindly use medication.