The common causes of knee pain when exposed to wind and cold include osteoarthritis, rheumatoid arthritis, gout, and age. 1. Osteoarthritis and rheumatoid arthritis: osteoarthritis patients are mostly seen in the elderly, may be accompanied by osteophytes, degenerative changes, etc., the pain is obvious when exposed to wind and cold or blowing fans. Rheumatoid arthritis patients, in addition to small joint swelling, pain, their knees can also appear sore symptoms. 2. Gout: In gout attack, the patient’s knee joints will be painful when he/she meets the wind, at this time, the patient needs to check the blood uric acid level, blood sedimentation, etc. to determine the cause of the disease. 3. Age: When the patient is older, the knee pain may also occur when the patient is exposed to wind and cold. When the knee is cold and windy, you need to go to the hospital in time for the relevant examination to determine the cause of treatment, and you need to pay more attention to local warmth in your daily life.