What causes a cold sore?

Do you have a pesky sore right above your lip? Dr. Tochi Iroku-Malize tells us how to treat and prevent those unwanted breakouts in this episode of Asking for a Friend.
About Northwell Health
As New York State’s largest health care provider and private employer, Northwell Health’s mission is to improve the health of our communities. Our focus is on prevention, wellness, and providing the full continuum of diagnosis, treatment and after-care services to all those we serve. Visit www.northwell....
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