Definition

• Painful, shallow ulcers (sores) on the lining of the mouth
• The gums, the inner sides of the lips or cheeks are the usual sites.
• Sores on the outer lips (e.g., recurrent fever blisters) are excluded

See More Appropriate Topic (instead of this one) If

• Have thick-walled, small-blisters on the palms or soles, in addition to mouth ulcers, see HAND-FOOT-MOUTH DISEASE.