Painful mouth ulcers are common and usually heal within 7 to 10 days. For relief, you can apply a topical oral ulcer gel to reduce pain, especially before meals. Avoid spicy, hot, and acidic foods, and rinse with warm salt water 2-3 times daily. If the ulcers last more than two weeks or keep recurring, consult a doctor for further evaluation.

Pain in the upper tooth, along with mouth ulcers and a sore tongue, can be due to a dental infection, vitamin deficiency (especially B12 or iron), oral irritation, or sometimes a fungal infection. You can use a pain-relieving oral gel for ulcers, rinse with warm salt water, and maintain good oral hygiene. If symptoms last more than 1-2 weeks or keep recurring, consult a doctor for proper evaluation and treatment.