Hypoglossia refers to the presence of a painful tongue, which may be due to lingual inflammation, tongue ulcers or tongue tumors. 1. Hypoglossia: Hypoglossia occurs in the front part of the tongue in most cases, and this disease may be caused by fungal infections such as Candida, which can cause numbness and burning pain in the tongue. Some patients also have symptoms of reduced saliva. 2. Tongue ulcers: tongue ulcers can also cause patients to experience tongue pain. Tongue ulcers are mainly caused by localized ulceration of the tongue due to bites or decreased body resistance. 3. Tongue tumor: Tongue tumor can lead to swelling at the tongue, and some patients will have ulceration on the surface of the swelling. When the tumor violates the nerves, it will cause the symptom of tongue pain. When tongue pain occurs, you should go to the hospital in time for examination and treatment according to the cause of the disease.