Hello and Welcome to Healthcaremagic. I will try to the best of my ability to help you with your concern. The most probable reason for recurring ulcers in your mouth is aphthous ulcer . These ulcers can occur due to various reasons like allergy ,stress ,hormonal changes , vitamin deficiency and trauma . There can be some underlying disease that is responsible for ulcers like crohn s disease . I would suggest you : - Avoid eating hot and spicy food . - Avoid eating sea food and nuts for sometime , because they can cause allergy . - Do warm saline rinses several times a day . Consult oral pathologist for proper diagnosis to find out if there is any underlying disease which can be responsible . He /she may order biopsy or blood test to findout the exact cause . Sometimes ulcers occur due to irritation because of dental appliance . So doctor may refer you to dentist for correction of dental appliance . Other possible treatments include placing a medication called chlortetracycline (Aureomycin) on the sores or injecting steroids into the sores. I hope it helps. Thanks Dr Harry Maheshwari