Before boiling snake's tongue grass, you need to soak it for about 20 minutes, soaked snake's tongue grass water boiling time will be shortened, generally the time of boiling snake's tongue grass should not be too long, otherwise it affects its effect.

Snake Tongue Grass, also known as White Flower Snake Tongue Grass, is the dried whole grass of White Flower Snake Tongue Grass, a plant in the family of Rubiaceae. Distributed in Yunnan, Guangdong, Guangxi, Fujian, Zhejiang, Anhui and other places. Harvested in summer and fall with the roots plucked grass, pick off weeds, shake off the mud, sun-dried. In addition, the whole herb contains Chelidonium; organic acids and their esters; Chelidonium glycosides, deacetyl Chelidonium glycosides, Dujiaozi glycosides, chicken shitouji glycoside methyl ester and other chemical constituents.