From a stomatologic point of view, looking at the tongue can give a general indication of the presence of mucosal diseases such as glossitis. However, relying only on the tongue can not confirm the diagnosis, it is necessary to combine the clinical manifestations, symptoms and instrumentation to confirm the diagnosis of the disease, tongue disease is often tumors, lingual inflammation disease. 1. Tumor. If the tongue is huge, hard to touch with hands, seems to have active nodules, or the tongue has a long-term non-healing deep ulcers, easy to bleed, suspected of the presence of tumors, clinical MRI or laboratory, the examination can be diagnosed with the presence of tumors. 2. Tongue inflammation. When there are scattered distribution of bright red dots on the back of the tongue, protruding from the surface of the tongue mucosa with tingling discomfort, asking about the history of external adverse stimuli, diet over spicy and irritating food, generally can be diagnosed with papillitis of the tongue. For the back of the tongue may appear characteristic lesions such as lichen planus on the back of the tongue will be found on the white plaques, candidiasis on the back of the tongue mucous membrane there is a thick white like snow can be erased plaques, but any disease diagnosis needs to be combined with the clinical examination to confirm.