1, clearing away heat and quenching thirst, moistening lung and resolving phlegm: Eleocharis tuberosa is rich in new liquid, which has the functions of clearing away heat and quenching thirst, moistening lung and resolving phlegm, so it can treat fatigue such as cough due to lung heat, expectoration and Sun Wong's thick phlegm.

2, laxative: water chestnut contains crude protein, starch, crude fat, can promote large intestine peristalsis, has the effect of moistening the intestines and relaxing the bowels, and has a certain effect on treating constipation.

3. Antibacterial and anti-inflammatory: Geheying is a heat-labile antibacterial component, which has inhibitory effects on Staphylococcus aureus, Escherichia coli, aerogenes, Pseudomonas aeruginosa and other bacteria.