There are many reasons for white ulcers on the mucosa in front of the palatoglossal arch, such as trauma, tuberculous ulcers, vitamin deficiencies, malignant tumors and so on. 1. Trauma: eating too fast and too quickly leads to teeth bite, or eating sharp food scratches the local, can lead to the mucous membrane in front of the palatoglossal arch with white ulcers. 2. Tuberculous ulcers: white ulcers on the mucous membrane in front of the palatoglossal arch may also belong to tuberculous ulcers, showing large ulcers and severe pain, which can be diagnosed by local pathology and systemic tuberculin test. 3. Vitamin deficiency: lack of vitamins in the body can lead to white ulcers on the mucosa in front of the palatoglossal arch, and the condition will recur. 4. Malignant tumors: white ulcers on the mucosa in front of the palatoglossal arch may be due to localized malignant tumors, which can be diagnosed by taking pathology. There are many reasons for the white ulcers on the mucous membrane in front of the palatine tongue arch, and it is recommended to go to the hospital in time to improve the examination and take standardized treatment under the guidance of the doctor after the appearance of symptoms, so do not ignore the symptoms and take them lightly.