Snake bed seed external washing has the effect of killing insects and relieving itching, drying dampness and dispelling wind, but not for the treatment of premature ejaculation. Snake bed for the umbellifer plant snake bed dry mature fruit. The flavor is pungent, bitter, warm; there is a small poison. Attributed to the kidney meridian. It has the efficacy of drying dampness, dispelling wind, killing insects and relieving itching, warming the kidney and strengthening yang (warming and tonifying yang qi in the kidney). It is used for yin itching and bring down, eczema itching, damp paralysis waist pain, kidney impotence, uterine cold infertility. Snake bed seed need to be correctly used under the guidance of a professional physician, but snake bed seed is warm and dry, yin deficiency and fire (Yin essence deficiency in the body, the emergence of hyperactive deficiency fire) or lower jiao damp and hot (dampness and heat evil invasion of the intestines, bladder, yin, lower limbs, etc.) need to be careful with the use of this drug, in order to avoid aggravation of the disease.