Hot compresses with coarse salt are helpful in treating knee pain. It can play the role of local blood circulation and promote blood circulation. But avoid too hot and too hot in the process of hot compresses, or it may burn the skin. In addition, there are many reasons for the pain and discomfort in the knee joint, which may be synovitis, degenerative osteoarthritis, gout, or meniscus injury. Coarse salt hot compress just play a simple physical therapy role, can not play a fundamental role in the treatment. Still need to go to the hospital orthopedics to find a doctor’s interview, the doctor combined with the preliminary analysis of the examination, and then is to do the appropriate examination to clarify the cause, such as filming to understand whether there is obvious degenerative osteoarthritis, or magnetic resonance imaging to check whether there is obvious meniscus damage or synovitis and other conditions, according to the results of the examination and then to do the appropriate treatment.