Elderly people with diabetes tongue rot may be ulcers or infections, mainly through diet, blood sugar control and symptomatic treatment and other comprehensive treatment, it is recommended that the treatment under the guidance of a doctor. 1. Diet: eat more vegetables, avoid spicy and stimulating foods, and take appropriate vitamin B2 supplement to promote wound recovery. 2. Control blood sugar: diabetic patients with tongue ulceration, if the blood sugar control is not good, it may affect the healing of the wound, or even infections and aggravate the condition. Glucose should be lowered by glucose-lowering drugs such as metformin or insulin. 3. Symptomatic treatment: diabetic patients with oral ulcers, the principle of local treatment is to keep the oral cavity clean, prevent secondary infection, remove local oral irritants, symptomatic treatment, reduce pain, and local anti-inflammatory, analgesic, and promote the healing of the lesion measures. In short, diabetic patients with tongue ulcers, must promptly seek medical attention, under the guidance of the doctor for treatment.