The generic name of horseshoe is water chestnut, which has certain effects of clearing heat and cooling blood (relieving blood heat by clearing heat), resolving phlegm, eliminating accumulation and removing cataracts, and can be used for fever and thirst, jaundice, eye redness and heat pain, etc. It is forbidden to use it for people with deficiency and cough, pregnant women, and people with deficiency and coldness in the middle chi. Horseshoe is sweet in taste and cold in nature, with the effects of clearing heat and cooling blood, resolving phlegm, eliminating accumulation and removing cataracts, it can be used for fever and thirst, cough with phlegm-heat, sore throat, stomatitis, scrofula (mainly refers to cervical lymph node nodule tuberculosis), jaundice, fever and lymph (burning stinging and pain in urination, accompanied by urinary frequency and urgency, and discomfort of abdominal traction), blood in the stool, redness and heat pain in the eyes and cataracts, etc. This product can be used internally or externally, and is contraindicated for people who are suffering from deficiency cough, pregnancy, deficiency cold. This product can be used internally or externally, internally can be decocted in soup, pounded juice, chewed, soaked in wine, clarified powder, externally can be clarified powder point eyes, raw rubbed, calcined powder, and so on. The adverse effects of this product is not clear, the deficiency of cough, pregnant women, the chi deficiency of cold is prohibited, the nature of this product is cold, is not recommended to take for a long time. It is recommended to consult a doctor in time when there is discomfort, under the guidance of a physician to use medication.