Mouth ulcers are small, painful sores that appear on the inside of the cheeks, lips, or tongue. They are incredibly common.

Mouth ulcers are small but genuinely painful, the kind of thing that makes eating, drinking, and even talking uncomfortable ...

If you’ve ever had a mouth ulcer, you already know how something so small can feel so painful. Eating becomes tricky, talking ...

A lack of essential nutrients can cause ulcers. Deficiency of vitamin B12 and iron has been linked to recurrent mouth ulcers.