Burn sore on lip

A burn sore on the lip is usually a tender area of injured surface tissue caused by heat, a chemical irritant, friction, or biting.

The lip contains skin, mucosa, small blood vessels, and sensory nerves, so a burn can produce redness, peeling, a blister, or a shallow ulcer. The appearance alone does not distinguish a thermal injury from a cold sore, traumatic ulcer, allergic reaction, or infection.

Hot food or drinks, a heated object, dental materials, spicy or acidic products, and accidental biting can injure the lip. The depth of the injury, its size, repeated irritation, immune health, and whether it is healing determine how it should be assessed.

Cool the area with clean, cool water or a cool damp compress, avoid picking the surface, and choose soft foods while it is tender. Avoid tobacco, alcohol-containing mouth rinses, and foods that sting; do not apply household chemicals or topical products not intended for the mouth.

Obtain prompt medical or dental assessment for a large blister, deep wound, spreading swelling, pus, fever, numbness, trouble eating or breathing, or an injury caused by a chemical. Arrange review if the sore is not clearly healing or keeps returning.