Canker sores typically recur. The ulcers also heal within a week to ten days. While there is no medicine to prevent their recurrence, some small measures may help.
Next Steps
Stress exacerbates these ulcers, so relax. Trauma from biting may bring on the ulcers. Some people may have ulcers due gastric problems. If you have frequent loose stools, consult a gastroenterologist.
Health Tips
You can reduce the burning sensation from the sores by applying mucopain gel over them before food.