Gan Sui is cold in nature and has the effect of dispersing knots and eliminating swelling. It can be used externally to treat carbuncles, swellings, sores and poisons caused by fire, heat and toxicity gathering on the surface of the body. Gan Sui belongs to the lung, kidney and large intestine meridians, with a bitter and poisonous taste, and its effects are diarrhea and drainage of water and dampness in the body through diarrhea, dispersing knots and eliminating swellings. It can be used internally to treat oedema and distension, fluid accumulation in the chest and abdomen, and coughing and wheezing, etc. Externally, it can be used for treating suppurative and infectious diseases on the surface of the body caused by carbuncle, swelling, and sores caused by fire-heat and poisonous evils. Generally speaking, Gan Sui is not suitable for people who are physically weak or pregnant to treat diseases. In addition, Gan Sui should not be used with Licorice, drug interactions may occur. The use of glycyrrhiza glabra needs to be combined with the specific disease, so it is necessary to go to the hospital, under the guidance of a professional Chinese medicine practitioner to use the drug, not blindly, so as to avoid the occurrence of the drug is not the right medicine or improper dosage of the drug used.