Cold sores are caused by the herpes simplex virus (HSV) which is often transmitted from person to person during kissing. Once it has infected the body, the virus lies dormant, generally being kept ...
Canker sores are vexing and common. The reason they occur isn’t clear, but your toothpaste could be a factor. An ingredient often used to make toothpaste foamy, sodium lauryl sulfate (SLS), has ...