A member asked:

What makes salt burn a blister in your mouth?

4 doctors weighed in across 2 answers

Irritating: While a dilute salt water rinse can promote healing and comfort, concentrated salt will irritate exposed nerves in an ulcerated wound and really get your attention.

Answered 8/4/2013

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Dr. Joel Doyon answered

Specializes in Dentistry - Cosmetic

An irritant: The blister is a raw wound that is not protected by an outer covering and salt is an irritant. The salt irritation will actually help stimulate the tissue to produce a cover over the wound.

Answered 8/5/2013

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