How do you heal a hole in a mouth?

To heal a hole in the mouth, such as a canker sore or a small injury, maintain good oral hygiene by gently brushing your teeth and rinsing with saltwater or an antiseptic mouthwash. Avoid irritating foods and drinks, like spicy or acidic items, which can exacerbate discomfort. Over-the-counter pain relief or topical treatments may help alleviate symptoms. If the hole is large, persistent, or shows signs of infection, consult a healthcare professional for proper diagnosis and treatment.