Poria cocos, good for treating damp-heat sores and poison. Yin itch is a common disease of women, the symptoms of the vulva and vagina itching, or even itching pain intolerable, restlessness, or accompanied by an increase in the belt, also known as the "itchy pussy door". Due to the deficiency of liver and kidney yin, essence and blood loss, vulva loss of nourishment and lead to vaginal itching, is a false evidence; due to the liver through the damp-heat downstream injection, with the impregnation of the vagina, or dampness and heat of the insect, worm erosion of the vagina, resulting in vaginal itching, for the actual evidence. Clinically, the latter is common. Yu commonly used to dry dampness and itching soup treatment, more immediate effect