Hi, following these steps will help, Medicated toothpaste without sodium laureth sulfate, Antibacterial mouthwashes to reduce secondary infection. Avoidance of foods that trigger or exacerbate the ulcers. Dietary supplements of vitamins or minerals, if diet is deficient. .Reduction in stress. . Protective pastes that form a barrier over the ulcer so that exposure to irritating substances is reduced. ..Superficial tissue cauterization using silver nitrate stick.. Consult Physician if symptoms persists...

Hello,it could be due to metabolic disturbance, trauma , hot food items, vitamin deficiencies etc.. Have buttermilk , curd ,tender coconut , apply local anesthestic gell ,take vitamin b complex tablets . Use a soft toothbrush when brushing your teeth. Reduce your stress levels by doing an activity that you find relaxing, such as yoga, meditation or exercise.consult general physician for further information.