Ginseng is the dried root of Ginseng, family Ginsengidae. It is sweet, bitter and salty in taste, slightly cold in nature, and belongs to the lung, stomach and kidney meridians. It has the efficacy of clearing heat and cooling the blood, nourishing yin and lowering fire, and detoxifying and dispersing knots. Xuan Shen is used in treating heat entering the camp and blood (the degree of invasion of heat evil into the body is deep and the symptoms are more serious), warm poisonous spots (warm and hot poisonous evil invades the body resulting in spots and plaques on the skin), heat disease injuring yin, tongue with reddish-red color and irritating thirst, constipation due to injury of the body fluid, bone vapor and laborious cushes, redness of the eyes, sore throat, diphtheria, scrofula (mainly refers to tuberculosis of lymph nodes of the neck), carbuncle, swelling, and poisonous sores. The adverse effects of the drug are not clear. It is not suitable to be used with veratrum. Psoriasis belongs to the Chinese medicine white mange, mostly due to factors such as the loss of blood in the body, blood heat within the body, dryness and wind, skin loss of nourishment. Ginseng in water can alleviate the symptoms of dry mouth and sore throat, but can not moisturize the skin. If you have a related condition, it is recommended to treat it under the guidance of a professional physician, not blindly self-medication.