When it rains, leg pain often occurs because it is cooler when it rains, after the legs are cooled, resulting in increased metabolites, accumulation, leg pain, according to this pathogenesis and pathogenesis can take the following measures: 1, strict leg warmth, usually to wear more clothing, and to use more warm water bags hot compresses, so that the local blood circulation can be better, arterial blood supply increased, venous reflux can also be This can effectively promote local inflammation, lactic acid and other metabolic products metabolism and absorption, peripheral nerve stimulation to reduce the symptoms of leg pain can be significantly improved, but also can play a very good preventive effect. 2, to keep the local aseptic inflammatory lesions fully relaxed, rest, to knee osteoarthritis, for example, if the knee joint pain, to try to keep the knee joint in a straight, relaxed state. If you have osteoarthritis of the knee, for example, if the knee is painful, try to keep it straight and relaxed. If you sit on a short stool and flex for too long, it may cause the blood circulation in the knee joint area to be affected, and it will lead to an increase in inflammatory metabolites and accumulation of local hyperplasia and degeneration, which will lead to a significant increase in pain, and good blood circulation after relaxation will be able to effectively relieve pain.