Blowing air conditioning ankle pain causes may be physiological, may also be pathologic, such as rheumatoid arthritis, synovitis and so on. 1. Physiological: when the ankle is cold from air conditioning, the synovial membrane, joint capsule and ligaments around the joint are prone to spasm and edema, thus causing soreness and pain in the joint area. 2. Rheumatoid arthritis: when suffering from rheumatoid arthritis, blood circulation in the ankle joint is impeded, and the capillaries contract when cold, causing ischemia and hypoxia of the local tissues, resulting in ankle pain. Therefore, when blowing the air conditioner, due to the lowering of the temperature, resulting in ankle pain. 3. Synovitis: When the ankle joint suffers from synovitis, the patient’s ankle synovial synovial fluid production is out of order. And after blowing air conditioning, the ankle joint is prone to secrete more synovial fluid under the stimulation of cold, leading to joint effusion and inducing ankle pain. Blowing air conditioning ankle pain may also be caused by inflammation of the soft tissues around the ankle joint, degenerative bone and joint changes. Physiological air conditioning ankle pain does not require special treatment, usually should pay attention to keep warm, avoid staying in the air-conditioned room for a long time. If the ankle pain is caused by pathological factors, it is recommended that the patient go to the hospital as soon as possible, so that the doctor can diagnose the cause of the disease and carry out treatment.