Herpes simplex labialis (HSL) is a common disease caused most often by herpes simplex virus type 1 (HSV-1). Primary infection is usually acquired during childhood or adolescence through direct mucosal ...

Is it a cold sore or a fever blister? You have a tiny, clear, and fluid-filled blister or group of blisters on your lip, it might itch, tingle, or burn. Is it a cold sore or fever blister? Technically ...

What has caused a 42-year-old man with high blood pressure and type 2 diabetes to suddenly develop large blisters on his right lower leg? That's the question facing Madeline DeWane, MD, and Daniela ...

Strappy shoes, yard work and sunburns make summer a peak season for blisters, but these tips can help prevent blisters from forming. You could also experience blistering from sunburn, or fever ...

BLISTERS MIGHT NOT seem like a big deal—until you get one and remember how debilitating they can be. These painful skin lesions are caused by friction when your skin rubs against your shoes, says ...

Friction blisters are small pockets of fluid that develop in the upper layers of the skin in response to an injury from friction. Home remedies and preventive measures may help. A friction blister ...

Have you ever eaten something spicy and felt that tingly, swollen-like sensation? That's kind of what sunburned lips feel like. "Sunburned lips are red, swollen, and painful," says Kenneth Howe, MD, ...