Herpes simplex virus type 1 symptoms (cold sores)

Herpes simplex virus type 1 symptoms (cold sores)

Location of cold sores near mouth, with close-up of blisters

Herpes simplex virus type 1 (HSV-1) can cause groups of small blisters that usually appear on the lip and around or inside the mouth. The groups of blisters are commonly called cold sores. They may be itchy or painful.

ByHealthwise StaffPrimary Medical Reviewer Sarah A. Marshall, MD - Family Medicine Adam Husney, MD - Family Medicine Martin J. Gabica, MD - Family Medicine Kevin C. Kiley, MD - Obstetrics and Gynecology

Current as ofMarch 28, 2018

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