Waking up with a spot on your lip is never a good feeling. Often cold sores or pimples are to blame, though telling the difference isn't always easy. They can look similar on the surface, but their ...

Casey Gallagher, MD, is a dermatologist and clinical professor in the Department of Dermatology at the University of Colorado Denver. Cold sores are contagious until they are completely healed.

Sometimes people will have triggers that are personal to them, says Adigun. “For example, spicy foods may be a trigger for someone. But more than likely spicy foods may be just for them, whereas we ...

So, what exactly are cold sores? According to Dr Kakai Kulabusia, a medical immunology specialist, these are small blister-like spots that appear in or around the outside of the mouth and are caused ...