Canker sores form inside the mouth on soft tissues like gums, cheeks, or under the tongue, and are not contagious. Cold sores usually appear on or around the lips and are caused by herpes simplex ...

It can be tempting to pop a cold sore. However, popping a cold sore releases infectious fluid from inside the blister, increasing the risk of further cold sores, infection, and scarring. In this ...

Cold sores are blisters that usually appear on the lips or around the mouth. The herpes simplex virus causes cold sores, and while there is no cure, cold sore creams can ease symptoms and slightly ...