Mucosal diseases are lesions that occur on the lips, cheeks, tongue, gums, palate, etc. They mainly include oral mucosal infectious diseases, oral metaplastic diseases, oral mucosal ulcers, oral mucosal herpetic diseases, oral mucosal mottled diseases, and lip and tongue diseases, as follows: 1. Oral mucosal infectious diseases: such as oral herpes simplex, herpes zoster, coccidiostomatitis, oral tuberculosis, Candida albicans infection, etc. 2. 2, oral allergic diseases: such as drug allergic stomatitis, angioneurotic edema, polymorphic exudative erythema, etc. 3, oral mucosal ulcers: such as recurrent oral ulcers, leukoplakia, traumatic blood blisters, traumatic ulcers, etc. 4, oral mucosal herpetic diseases: such as aspergillosis, scar-like aspergillosis, herpetic aspergillosis, paraneoplastic aspergillosis, etc. 5, oral mucosal mottled diseases: such as Oral white keratosis, oral white spots, oral erythema, etc. 6, lip and tongue diseases: such as chronic labyrinthitis, stomatitis, tongue inflammation, granulomatous labyrinthitis, etc.