Canker sores usually appear as round, painful open sores that have a white or yellowish coating and a red "halo" around them. Most are small (¼ inch, or 6 millimeters across) and shallow, but ...

Your mouth might tingle or burn before a canker sore appears. Soon, a small red bump rises. Then after a day or so it bursts, leaving an open, shallow white or yellowish wound with a red border. The ...

Cold sores are patches of small, painful blisters that show up on your lips and around your mouth. They're usually caused by a strain of the herpes simplex virus -- HSV-1 -- which first enters ...

When herpes does cause symptoms, the most common one is sores and blisters that show up on the parts of your body where the infection lives ... your herpes sores will begin to crust over, scab like a ...

Like an annoying house pest, canker sores are a minor inconvenience that can really do a damper on your days. The little ...