Tongue inflammation includes papillitis of tongue, atrophic lingual inflammation, etc. The diagnosis is made through clinical visualization, pathological examination and systemic examination, etc. The details are as follows. 1. Tongue papillitis: filiform papillitis is characterized by atrophic damage, while other papillitis is generally characterized by redness and swelling of the papillae, which can be diagnosed through clinical visual examination and according to clinical manifestations. Among them, contour papillitis and lobed papillitis can be distinguished from tumor by histopathological examination. 2. Atrophic lingual inflammation: Diagnosis can be made by clinical diagnosis based on the feature of smooth and red mirror-like dorsum of the tongue. The etiology of the disease can be clarified through systemic examination, such as serum iron concentration, total iron binding capacity, autoantibody test, Candida test, and so on. It is recommended to visit a hospital and receive regular treatment.