Dermatophytosis is an acute infectious disease in which the affected skin suddenly becomes red and flaky, with a color like paint. Small red patches are seen on the local skin, which quickly spread into large bright red patches with clear borders slightly above the skin surface, and the redness of the skin decreases when pressed, and immediately recovers after letting go. If the purple spots appear due to the heat and toxicity, the color will not fade when pressed. The disease is indefinite, and has different names according to its location, such as those born in the trunk and cadres, called internal Dantoxicity; those born in the head and face, called head-holding fire Dan; those born in the calves and feet, called flowing fire; newborns are mostly born in the buttocks, called red tour Dantoxicity. The disease is also known as Dantoxicosis in Western medicine, which is an acute inflammation caused by β-hemolytic streptococcus invading the intra-dermal reticular lymphatic vessels from the fine breakage of the skin or mucous membrane.