Anatomically speaking, the oral cavity starts from the palatoglossal arch (the arch structure connecting the upper palate and the base of the tongue), the forward part is under the jurisdiction of stomatology, and the backward part is under the jurisdiction of otolaryngology, so the teeth, tongue, upper palate, lips, cheeks, the lower part of the oral surface and the upper part of the neck belong to the stomatological tube. If there is something wrong with these parts, you must see the stomatology department. From the setting of stomatology, the higher the hospital level, the finer the division of stomatology, and the more diseases you can see. Now let me briefly introduce the division of stomatology: Endodontics: If you have toothache or rotten teeth, you should first look at this department, and the doctor will check where the inflammation is or whether the teeth can be filled or pulled out. Dental caries, pulpitis and periapical periodontitis are all treated by this department and are common in all oral dentistry. Oral and Maxillofacial Surgery: All kinds of operations that need tooth extraction or oral cavity belong to this department, as well as facial nerve, blood vessels, muscles, jaws and salivary glands. Such as facial paralysis, trigeminal neuralgia, facial trauma, jaw fracture, mumps and cancerous cysts of various oral organs are all seen in oral surgery. Low-level hospitals can only do some small outpatient operations, while advanced hospitals can do some major operations with wards, as well as some plastic surgery. Nowadays, many of the cosmetic plastic surgery publicized outside belong to oral and maxillofacial surgery; Prosthodontics: it belongs to this department to do various activities or fix dentures, or to make a coat for teeth; Implant dentistry: it specializes in dental implants, and some hospitals belong to oral surgery or prosthodontics; Orthodontics: this is a department with irregular teeth arrangement and neat hoops; Oral and Periodontal Department: specializes in treating various types of periodontal diseases. General hospitals have tooth cleaning rooms, which are specialized in cleaning teeth and belong to the most basic preventive treatment of periodontal diseases. If you don't do a good job in daily health care and regular tooth cleaning, and the teeth of periodontitis are loose or loose, you should see a periodontist as soon as possible. This is not a problem that ordinary tooth cleaning can solve. Only some higher-level hospitals in this department have specialties; Oral Mucosal Department: Specializing in oral mucosal diseases. The skin outside the human body is called skin, and the skin inside the mouth is called mucous membrane. The most common keratitis, oral ulcers and cold sores are all seen in this department, as are these simple hospitals with good prognosis. There is nothing special about medication. In addition, there are many kinds of mucosal diseases, low incidence, difficult diagnosis, complicated treatment, special drugs, long course of treatment, some poor prognosis, and several precancerous lesions have a certain canceration rate. These diseases can only be seen by the Department of Oral Mucosa, which is generally set up in a specialized stomatological hospital, and also in some higher-level general hospitals, but the diseases that can be seen and the drugs used are still limited; Children's Dentistry: Because children are in the period of growth and development, and their tooth structure, disease types and treatment methods are different from those of adults, children before the eruption of the second molar and the complete formation of the root are served by stomatology (generally about 15 years old). The above is the general situation of stomatology. You can choose according to your own situation. If you are not clear, the registered or triage nurse will ask you. If this is a disease they can't see, they should tell you.