The main functions of Shiduqing Capsule are nourishing blood and moistening skin, expelling wind and relieving itching. Used for wind itching caused by blood deficiency and wind dryness, characterized by dry skin, desquamation and itching, accompanied by scratches, blood scabs and pigmentation; Skin pruritus with the above syndromes. Shiduqing capsule has antipruritic effect. It can resist the itching of mice caused by dextran and improve the itching threshold of histamine on guinea pig skin itching. Shiduqing capsule has antiallergic effect. It can resist non-immune contact urticaria caused by dimethyl sulfoxide in guinea pigs; It has obvious inhibitory effect on passive skin allergic reaction in rats. Shiduqing capsule has anti-inflammatory effect. It can inhibit the increase of capillary permeability caused by histamine in rats; Significantly eliminate ear swelling caused by croton oil in mice. Shiduqing capsule has the best effect on skin pruritus of wind-heat invasion type and damp-heat downward flow type, and has obvious effect on urticaria and eczema. Can significantly improve the skin. The itch threshold of itching reaction has obvious inhibition effect on skin allergic reaction. In addition, Shiduqing capsule has obvious curative effect on skin itching caused by skin atrophy and dryness in the elderly.