Young people rainy day knee pain should be treated according to the specific causes, common causes of rheumatoid arthritis, meniscus injury, or chronic arthritis caused by long-term knee cold, etc., generally take the treatment includes physical therapy and drug therapy. 1. Rheumatoid arthritis: rheumatoid arthritis will aggravate with the change of weather, should go to the hospital in time for laboratory examination and streptococcal antigen and antibody test, etc. Generally, the use of penicillin, erythromycin and other antibiotics to remove the cause of the disease, the use of aspirin, celecoxib and so on to ease the pain in the joints, the use of glucocorticosteroids to control inflammatory response. 2. Meniscus injury: If the meniscus injury does not heal for a long time, it will cause chronic inflammation of the knee joint, resulting in pain, you should actively go to the hospital to check the meniscus injury, reduce the exercise, physical therapy to improve the symptoms, and if it is not effective, you need to have surgery to repair the meniscus. 3. Long-term knee cold: long-term knee cold will lead to the occurrence of chronic arthritis caused by joint pain, must keep the knee warm, wear knee pads, hot compresses, physiotherapy, moxibustion, etc., the pain is more serious can take non-steroidal anti-inflammatory drugs and wind removing dampness medicines, such as celecoxib, dahuangluo dan and so on. Young people knee pain on rainy days there may be other reasons, it is recommended that patients should go to the hospital in a timely manner to clarify the cause of the disease and the appropriate treatment, the above drugs should be used under the guidance of a doctor.