Tin is a compound Chinese medicine in the form of grayish-blue or greenish-gray powder. It has a cool taste and a slightly grassy smell. Its main active ingredients are ivory shavings, Qing Dai, human nails, Bichan charcoal, pearl, ice chips and niuhuang. Its medicinal effect is mainly for detoxification and decomposition, and is mainly used clinically for soreness and swelling of the throat. The specification is 1-1.5 grams per bottle. The clinical use is to take a small amount of the drug, using cotton swabs to apply to the affected area or a special blowing pot will be a small amount of the drug blown on the affected area, the specific number of times and time to follow the doctor’s instructions.