Gum root ulcers are associated with trauma, oral ulcers, and periapical inflammation. 1. Trauma: When patients have trauma to the gum area, such as sharp food scratches, toothbrush scratches, etc., it may cause gum root ulcers. Patients are also prone to swelling, bleeding, pain and other uncomfortable symptoms. 2. Mouth ulcers: the cause of mouth ulcers is still unclear, and may be related to genetic factors, decreased immunity, mental factors, improper diet and so on. When oral ulcers appear in the gum area, they can be manifested as ulcers at the root of the gums, and they are also easy to be accompanied by localized redness, swelling, pain, low-grade fever, and localized lymph node enlargement and other symptoms. 3. Periapical periodontitis: Periapical periodontitis is related to bacterial infection and physical stimulation. Usually the patient’s gums are swollen in the apical part, accompanied by pain, fever, weakness, pus and other symptoms, which can be manifested as gum root ulcers. It is recommended that people with root ulcers consult a doctor for an examination to clarify the disease and then follow the doctor’s instructions for treatment. Pay attention to daily oral hygiene, develop good oral care habits, should also be regular medical review.