Effect on capillaries. Rutin and its aglycone quercetin in Sophora japonica can maintain the normal resistance of capillaries, reduce the permeability of blood vessels, and restore the normal elasticity of capillaries bleeding due to increased brittleness. Anti-inflammatory effect: it can inhibit foot mania and edema caused by hyaluronidase, and the effect of preventing inflammation is better. Spasmodic and anti-ulcer effects Quercetin can reduce the tension of intestinal and bronchial smooth muscle, its spasmolytic effect is five times stronger than rutin, and its influence on cardiovascular system can dilate coronary vessels and improve myocardial circulation.

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Sophora japonica refers to the flowers and buds of Sophora japonica, a leguminous plant, which are harvested in summer when flowers bloom or buds form, dried in time, and branches, stems and impurities are removed. The former is called "Sophora japonica" and the latter is called "Sophora japonica". Picking summer flowers when they are in bloom is called "Sophora japonica". After harvesting, remove the branches, stems and impurities of inflorescences, and dry them in the sun in time for raw use, frying or charcoal use. Loess Plateau and North China Plain are the most productive areas in China. Sophora japonica is a temperate tree species, which likes light and dry and cold climate, but it can also grow in South China with high temperature and high humidity.

Sophora japonica contains rutin, Sophora japonica diol, glucose, glucuronic acid and tannin, which can reduce capillary permeability, have anti-inflammatory effects, make capillary dense, inhibit exudation, and inhibit viruses and skin fungi in test tubes. In clinical medicine, raw Sophora japonica has achieved good results in treating various skin diseases.