What is the medical term for a blister containing water fluid?

The medical term for a blister containing clear fluid is "bulla." A bulla is typically defined as a larger blister that measures more than 0.5 centimeters in diameter and is filled with serous fluid. It often forms as a result of friction, burns, or skin diseases. Recognizing a bulla is important in clinical practice because it can indicate underlying conditions or provide information about the nature of a skin injury.

In contrast, a vesicle is a smaller fluid-filled blister, usually less than 0.5 centimeters in diameter, while a pustule is a blister that contains pus rather than clear fluid, indicating the presence of infection or inflammation. An abscess refers to a collection of pus beneath the skin, often due to infection, which is different from blisters that are primarily fluid-filled sacs. Understanding these distinctions is crucial in accurate diagnosis and treatment within the field of dermatology and massage therapy.