The syndrome of Dan Poison has been known for a long time. The “Suwen – to the truth to the great treatise” called “”. In the Qing Dynasty, Gu Shicheng wrote “Ulcer Doctor Daquan”, the name of flowing fire began, “flowing fire, two feet red and swollen bright, its heat is like fire.” The disease has the same name in Chinese and Western medicine. Chinese medicine believes that this disease is mainly due to the blood part of the heat, fire poison invasion, depressed in the skin and hair, or due to the skin mucous membrane damage, poisonous evil invasion by the opportunity to become. Therefore, “Sheng Ji General Record” says: “heat and poisonous gas, bursting in the skin between, can not be drained, it is stored heat for Dan Poison.” Western medicine believes that this disease is β-hemolytic streptococcus from the skin, mucous membrane microscopic damage invasion of intradermal reticular lymphatic vessels caused by lymphadenitis and the onset. The disease occurs internally because of the deficiency of dampness and heat stagnation of the meridians, externally because of the poisonous attack on the blood, heat and dampness in the muscle coup, resulting in stagnation of qi and blood meridians. For acute attacks of dampness, the treatment should be to clear heat and dampness, cool the blood and detoxify the toxin. For recurrent Dantoxicosis that does not heal repeatedly, the treatment should be to harmonize the camp and eliminate swelling, and to strengthen the spleen and permeate dampness.