Black beans can tonify essence, nourish blood, dispel wind and diuretic, and detoxify. Mung beans can clear away heat and detoxify, eliminate summer heat, and promote water retention. Red beans can reduce water retention, clear heat and detoxification, eliminate carbuncle and pus. Although black beans, mung beans and red beans all belong to beans, they are used as traditional Chinese medicine, and their effects are different. Black beans belong to the tonic class of Chinese medicine, medicinal properties of sweet, flat, to the spleen, kidney meridian. Used for Yin deficiency caused by dry mouth and thirst, dizziness and dizziness and kidney deficiency, waist pain, edema and urination, paralysis, joint pain and contracture. Mung beans are heat-clearing herbs, suitable for summer heatstroke, fever and thirst, as well as carbuncles and sores. Red beans are sweet, sour and flat. It belongs to the heart and small intestine meridian. It is used for edema, bulging, swollen feet, internal carbuncle, external carbuncle sores and poisons. Drugs should be taken under the guidance of a doctor, not self-medication.