A member asked:

What causes cold sore in corner of mouth?

8 doctors weighed in across 2 answers
Dr. Heidi Fowler answered

Specializes in Psychiatry

If it is an actual : Cold sore it would be caused by herpes simplex type i virus.

Answered 11/27/2020

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See your dentist:: In the corners of the mouth you can get Angular Chelitis, especially as you get older. Unlike a cold sore you would not get blisters, which later brake. then leading to a sore. With angular chelitis you can get fissures radiating at the angles of the mouth. It may be uncomfortable and even painful to open your mouth wide, see your dentist for the appropiate diagnosis and treatment.

Answered 11/27/2020

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