Introduction

Mouth ulcers are painful sores that appear in the mouth. Although they're uncomfortable, theyre usually harmless and most clear up by themselves within a week or two.

Mouth ulcers are common and can usually be managed at home, without seeing your dentist or GP. Visit your pharmacist first, unless your ulcer has lasted longer than three weeks.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 28 Nov 2016