Blisters are bumps on the skin filled with fluid. They can be caused by friction, burns, irritation, infection, or certain health conditions. Most blisters go away on their own. You shouldn't pop a blister unless your doctor instructs you to. Follow the links below to find WebMD's comprehensive coverage about how blisters are caused, signs of a blister, and treatments for blisters.
Blister Treatments and Prevention
WebMD explains how to treat a blister and prevent a new one.
Symptoms of a Blister
Learn more from WebMD about the symptoms of a blister, and when to call the doctor.
Blisters: What You Should Know
Find out what causes blisters, how to treat them at home, and when you should call your doctor.
Stevens-Johnson Syndrome (SJS)
Stevens-Johnson syndrome is a rare, very serious disease that makes skin blister and peel off. You'll need special care to prevent long-term damage to your skin and other organs.
Slideshows & Images
Blisters Causes and Treatment
Blisters can result from an ill-fitting shoe, a bug bite, or a serious health problem like shingles. Find out more about what causes them and how to treat them.
Picture of Sucking Blister
Sucking blister. The oval blister pictured here was present at birth and is a result of normal sucking behavior in utero. Sucking blisters are fairly common and are usually located on the forearm, wrist, or hand. They are most often solitary and involve only one upper extremity. However, lesions involving both hands, or even involving a foot, are sometimes seen. The sucking blister resolves spontaneously as soon as bottle or breast is offered as a dietary substitute.
Picture of Shingles Blisters
The cluster of blisters that form with shingles fill with fluid, pop, then start to ooze. Eventually the affected areas crust over and heal like the rash shown here.
Treating and Preventing Cold Sores
Besides being itchy and painful, cold sores make you feel self-conscious. This slideshow illustrates how to prevent and treat cold sores caused by the herpes virus.