Hello: Houttuynia cordata is mainly used for clearing away heat and toxic materials. Compendium of Materia Medica details its functions as follows: clearing away heat and toxic materials, eliminating carbuncle and discharging pus, inducing diuresis to relieve stranguria, clearing away lung heat and relieving cough (mostly used for lung heat and suppuration, such as lung carbuncle); Insecticides, such as folk remedies and Vitex negundo leaves used to treat tinea pedis. In gynecology, Houttuynia cordata Thunb has the functions of clearing away heat and toxic materials, eliminating carbuncle and expelling pus, inducing diuresis and treating stranguria, which has a certain curative effect than frequent urination, urgent urination, red blood and purple odor and abdominal pain. The effect of single use is weak, so it is more suitable to be used in prescription.