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    Understanding Blisters -- Symptoms

    What Are the Symptoms of a Blister?

    A blister is a bubble of skin filled with clear fluid, ranging from pinpoint size to more than an inch in diameter. They are different than pustules, which contain thicker, yellow-white material.

    Depending on the cause, blistering may be accompanied by pain, redness, or itching.

    Understanding Blisters

    Find out more about blisters:

    Basics

    Symptoms

    Treatment

    Call Your Doctor About a Blister If:

    The blister was caused by contact with a chemical -- or a known disease.

    WebMD Medical Reference

    Reviewed by Jennifer Robinson, MD on March 01, 2015

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