"Dr. Dustin Portela reveals the best remedies for treating painful canker sores. Dr. Dustin Portela, 208skindoc, focuses on ...

A 5-gram tube of Zovirax cream runs more than $200. A month’s supply of valacyclovir (500 milligrams) tablets costs between ...

Here's what experts say about using antibiotics to treat the common cold — and why you can still catch one in the summer.

Medically reviewed by Katlein Franca, MD In some ways, the features of a cold sore vs. a pimple on the lip line are very ...