Horseshoe, or water chestnut, is a heat-clearing medicine. The effects of water chestnut in boiling water are to clear away heat and produce fluids, dissolve phlegm and eliminate stagnation. It should be noted that the effect of a single Chinese medicine is weak, and can be used with other medicines under the guidance of traditional Chinese medicine to achieve the best therapeutic effect. Water chestnut, sweet in taste and cold in nature, belongs to the lung and stomach meridians. Clinically, it is mainly used for the treatment of warm disease thirst, sore throat, phlegm-heat cough, eye redness, thirst, dysentery, jaundice, hot lymph (burning stinging pain obvious when urinating, accompanied by urinary frequency and urgency, small abdominal traction discomfort), food stagnation (indigestion of food and stagnation in the stomach), warts (skin growth of warts) and so on. It should be noted that people with deficiency of cold and blood should take it with caution. For specific use of the drug, please consult a medical professional.