Side effects of Fang Feng have been reported to cause occasional allergic reactions, which are cured after discontinuing use. This drug should not be used for people with blood deficiency and spasms, yin deficiency and fire exuberance (deficiency of yin and essence in the body and the appearance of hyperactive deficiency fire). Fangfeng is the root of the umbelliferae plant Fangfeng, its flavor is pungent, sweet, slightly warm, to the bladder, liver, spleen meridian, has the effect of expelling wind and relieving the surface, winning the dampness to relieve pain (to remove the pain caused by excessive dampness), antispasmodic effect, the main treatment of external surface symptoms (feel the outside world after the evil mainly manifested as respiratory symptoms, rheumatism and paralysis, rubella, itchy, tetanus, etc.). Clinically, there are reports of allergic reactions after taking Fangfeng, but it is cured after stopping the use. This product is slightly warm, should not be used for spasm caused by deficiency of yin and blood, as well as yin deficiency and fire (deficiency of yin and essence in the body, the emergence of hyperactive fire). Specific medication should be administered under the guidance of a specialist, and should not be used without authorization.