Mouth Ulcers That Won’t Heal: Causes, Treatment & When to Worry

Close-up of a mouth ulcer on the inner lower lip, showing a red sore with a pale center.

Mouth ulcers are a very common oral concern among people of all ages. These painful sores form on the soft tissues of the mouth and can make basic activities like eating, speaking, and drinking extremely uncomfortable. While most mouth ulcers heal within 7–14 days, mouth ulcers that won’t heal or return frequently can be a […]