For quick and effective relief from mouth ulcers, I recommend using an over-the-counter topical gel containing benzocaine (like Orajel) to numb the pain instantly. To speed up healing, apply a corticosteroid dental paste, such as triamcinolone acetonide, directly onto the ulcer before bed. Rinsing your mouth with warm saltwater or a chlorhexidine mouthwash also helps prevent infection. Avoid spicy, acidic, or sharp foods that can irritate the sore. If the ulcer lasts longer than two weeks, is extremely painful, or is accompanied by a fever, please consult a doctor or dentist.