Recurrent mouth ulcers for several years can be frustrating and uncomfortable, especially when they keep returning despite treatment. Mouth ulcers may occur due to stress, lack of sleep, acidity, vitamin deficiencies such as low vitamin B12, iron, or folic acid, food sensitivities, sharp teeth, poor oral hygiene, or sometimes underlying medical conditions. Medicines like Lexanox and Smile gel can help reduce pain and speed healing during an active ulcer, but they may not prevent the ulcers from coming back if the root cause is not identified. Try to avoid spicy, very hot, or acidic foods, maintain good hydration, use a soft toothbrush, and avoid tobacco or smoking if applicable. Eating a balanced diet rich in fruits, vegetables, and vitamins may also help. Since your ulcers have been recurring for the past 3 years, it would be a good idea to undergo a proper medical evaluation to look for possible nutritional deficiencies, acidity issues, allergies, or other health conditions. You can initially consult a general physician, who may advise blood tests and a basic evaluation. An ENT specialist or an oral medicine/dental specialist can also examine the mouth carefully if the ulcers are severe, very frequent, large, or not healing properly. If you notice weight loss, fever, difficulty swallowing, bleeding, or ulcers lasting more than 2 weeks continuously, you should seek medical attention promptly.

Canker sores, also known as mouth ulcers, usually heal within 1-2 weeks, but some ulcers can take longer and may be painful while eating or speaking. Since you have already been using Lexanox and Becosules for 5 days without much improvement, there is still a chance that the ulcers may settle with a few more days of care. In the meantime, try to avoid spicy, acidic, very hot, or hard foods, as these can irritate the ulcers further. Drink enough water, maintain good oral hygiene, and use a soft toothbrush. Stress, lack of sleep, vitamin deficiencies, acidity, sharp teeth, and some food sensitivities can also trigger recurrent mouth ulcers. Warm salt water rinses may help reduce discomfort and keep the mouth clean. However, if the ulcers are very large, extremely painful, frequently recurring, associated with fever, weight loss, difficulty swallowing, or if they do not improve within 1-2 weeks, then you should consult a doctor. An ENT specialist or an oral medicine/dental specialist can evaluate persistent or recurrent ulcers properly and check for underlying causes such as nutritional deficiencies, infection, allergy, or other medical conditions.