In clinical practice, Yin Chen is usually brewed with boiled water, and the recommended dosage is 6 to 15g. Yin Chen is bitter, pungent and slightly cold in nature, belonging to the spleen, stomach, liver and gallbladder meridians, with the effect of clearing dampness and heat, relieving yellowness and inducing bile. It is used in the treatment of jaundice, dysuria, summer dampness, dampness and warmth, wet sores and itching. When used, it should be noted that Yin Chen is bitter and cold, so patients with cold spleen and stomach should not use it. The recommended dosage is 6~15g, but the efficacy of taking it in water is limited and it can not be used as a substitute for medication in the treatment of diseases. Yin Chen is generally used as a decoction for internal use or externally as a decoction and fumigation. If necessary, it is recommended to go to a regular hospital, under the guidance of a professional physician to identify the treatment.