Black tongue tip is mainly seen in the following cases: 1, caused by food or drugs, such as eating mulberry, black sesame paste, chocolate, liquid iron, Chinese medicine bone marrow, etc., will lead to dyed moss appearing black tongue tip, without any other discomfort, and can be improved after drinking more water; 2, caused by infection, high fever, due to the role of inflammation will lead to excessive growth of the filiform papillae of the tongue, in the role of microorganisms to produce brown-black This is caused by anti-infection, antipyretic and causative treatment, gargling with compound chlorhexidine in the morning and evening; 3, caused by mycobacterial infection, which requires laboratory examination to clarify, most commonly in patients who are bedridden and use hormonal drugs; 4, in Chinese medicine, it is thought to be caused by heat and fire, and the improvement method is to drink more water and use honeysuckle, dandelion and other fire-removing Herbs to drink water.