Mung bean water is mainly made of mung beans and water boiled, mung bean water on the skin is the role of the treatment of sores, carbuncles, rashes and dengtoxin (acute infectious diseases, visible skin red like paint) and so on; there is a heat detoxification (clear the body of the heat and poisonous evil) efficacy. Mung bean belongs to a kind of traditional Chinese medicine, its taste is sweet, sex is cool, into the heart, liver, stomach meridian, it has the effect of clearing away heat and detoxification, eliminating summer heat, water. Mung bean decoction on the skin is useful for treating sores and carbuncles, in addition to improving rubella and dengue, but a single Chinese medicine is generally not used as a treatment option. The adverse effects and contraindications of mung bean are not known. It should be noted that it is contraindicated for people with cold spleen and stomach (weak and cold spleen and stomach) and slippery diarrhea. When treating with the drug mung bean water, you need to be guided by a professional Chinese medicine practitioner to identify the evidence and use the drug.