Mouth ulcers, also known as canker sores, are painful lesions that can develop on the soft tissues inside the mouth, including the gums, tongue, and inside of the cheeks. They often appear as small, round, white or yellow sores with a red border. Common causes include: Injury or trauma: Biting the inside of your cheek or irritation from braces. Nutritional deficiencies: Lack of vitamins such as B12, iron, or folic acid. Stress: Emotional stress can trigger outbreaks. Hormonal changes: Fluctuations can lead to ulcers in some individuals. Underlying health conditions: Conditions like celiac disease or inflammatory bowel disease. Treatment options: Over-the-counter pain relief: Topical treatments or gels can alleviate pain. Rinses: Saltwater or baking soda rinses may help. Avoiding irritants: Spicy or acidic foods can worsen the pain. Dietary adjustments: Ensuring a balanced diet may prevent recurrence