Blowing on the air conditioning knee pain may be caused by the temperature is too low, but also may be caused by knee synovitis, osteoarthritis and other diseases, as well as chondromalacia patella and other diseases. 1. Low temperature: If the temperature is too low when the patient is blowing the air conditioner, it may cause the skin temperature to be too low, which may lead to the phenomenon of muscle spasms, and thus the symptoms of knee pain. 2. Knee synovitis: the pathogenesis of knee synovitis is not clear, and it is considered to be caused by degenerative disease of the knee joint. The main symptoms of patients are swelling of the knee joint, pain, activity limitation, etc., and there will be joint weakness, leg weakness and other symptoms. 3. Osteoarthritis: The cause and pathogenesis of osteoarthritis are not clear, mostly related to age, inflammation and other factors. Patients will experience joint pain, decreased joint mobility, stiffness, joint weakness and other symptoms. 4. Other: chondromalacia patellae, rheumatoid arthritis and other diseases can also lead to patients with air conditioning knee pain. When patients have symptoms of knee pain when blowing air conditioning, it may be caused by the temperature is too low, do not need special treatment. It may also be caused by disease, patients should consult a doctor in time, and follow the doctor’s instructions for treatment.