1 doctor weighed in:

Sore appear on the outside of lip unlike canker sores on the inside. What could it be?

1 doctor weighed in
Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology

In brief: Fever blisters

Fever blisters or cold sores caused by a virus, herpes simplex virus type 1 (hsv-1).
Docosanol sold over-the-counter as abreva is reasonably effective when started early in the course of an outbreak.

In brief: Fever blisters

Fever blisters or cold sores caused by a virus, herpes simplex virus type 1 (hsv-1).
Docosanol sold over-the-counter as abreva is reasonably effective when started early in the course of an outbreak.
Dr. Steven Machtinger
Dr. Steven Machtinger
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