Overview Overview A canker sore is a small, shallow sore inside the mouth or at the base of the gums. Unlike a cold sore, it doesn't occur on the lips and isn't contagious.
Overview A canker sore is a small, shallow sore inside the mouth or at the base of the gums. Unlike a cold sore, it doesn't occur on the lips and isn't contagious.
Treatments Treatments Most canker sores clear on their own in 1 to 2 weeks. Treatments, if needed, include mouth rinses, pastes, and medication.
Treatments Most canker sores clear on their own in 1 to 2 weeks. Treatments, if needed, include mouth rinses, pastes, and medication.