Corn silk water refers to corn silk water, which is neither cold nor hot, but warm. Corn is hot, and corn must be cold. Corn silk, the name of traditional Chinese medicine, is also called corn silk, corn silk and corn silk. In traditional Chinese medicine, corn stigma is also called "Chinese alpine rush". This is the style and stigma of Gramineae corn. Most parts of the country also produce. When the fruits are ripe in summer and autumn, they are harvested, impurities are removed, and they are rarely used or dried for raw use.

Corn stigma is often assembled into loose clusters, with linear or whisker-like style, complete length of 30 cm, diameter of 0.5 mm, light green, yellow-green to brownish red, shiny, slightly transparent, stigma 2-split, bifurcated, soft and odorless. Soft and shiny is preferred. The picking of corn silk must be strictly controlled. Ensure no pesticide pollution, no insect infection, no rotten parts and other inappropriate impurities. Post-preservation needs to pay attention to strictly prevent pollution and corruption. Once found, clean it up in time.