The appearance of ulcers at the root of the tongue indicates the existence of lesions in the mucous membrane at the root of the tongue, and the first consideration may be related to poor oral hygiene habits. When the oral environment is poor, it is easy to induce local mucosal lesions, and when the ulcers at the root of the tongue are painful or seriously affect the diet, it is recommended to seek medical attention in time to clarify the diagnosis.1. Recurrent oral ulcers: It is a common clinical oral mucosal disease, which may be related to vitamin B12, folic acid and other micronutrient deficiencies caused by partial diet. The clinical manifestation is often the recurrent ulcers of the patient, which occur in the mucosal gland-rich area and also in the root area of the tongue, with round or oval ulcers. Mild cases can be self-healing, if more serious, it is recommended to seek medical advice and accept anti-inflammatory and pain-relieving drugs, commonly used drugs such as chlorhexidine with gargle, ulcers, lidocaine gel, etc., and also appropriate vitamin supplements; 2, traumatic ulcers: such as bites, fish spikes, food burns and other reasons can lead to damage to the mucous membrane of the patient’s tongue root, the formation of traumatic ulcers. Traumatic ulcers generally have a history of injury and are easily distinguished from ulcers of the tongue root caused by other diseases. When a traumatic ulcer appears, the local symptoms can be relieved by watermelon cream, ice borax and other drugs under the guidance of a doctor; 3, oral herpes simplex: mostly due to herpes virus infection, mainly through droplets, saliva and herpes fluid contact triggered, mostly in children. The rupture of herpes may cause ulcers, and in severe cases, fever and anorexia may occur. The disease requires good isolation, control the infection through drugs, commonly used drugs are acyclovir, penciclovir, etc., if necessary, laser treatment to relieve local pain; 4, oral lichen planus: clinical considerations and immune factors, disease factors, endocrine factors and mucosal local irritation and other factors, often manifested as oral mucosa erosion, ulcers, mostly seen in the gums, tongue and other parts, can also occur in the tongue root It is associated with local discomfort, dry mouth and other symptoms. If fungal infection occurs, it is necessary to receive antifungal treatment as prescribed by the doctor, and if necessary, it can be treated by carbon dioxide laser. 5. Tongue cancer: It is a malignant tumor that occurs in the middle 1/3 of the lateral margin of the tongue, which can lead to ulcers or infiltrative masses on the side or root of the tongue, and is painful. The cause of tongue cancer is not clear, but it is considered to be related to environmental factors. A confirmed diagnosis of tongue cancer usually requires surgical excision clinically to avoid metastasis, which can be followed by reconstructive therapy to help restore the function of the tongue. It should be noted that ulcers on the tongue root, no matter what the cause is, need to pay attention to good eating habits and a light diet to avoid aggravating local irritation, as well as to eat more fruits and vegetables to supplement vitamins.