A small blister filled with fluid is medically termed as a?

A small blister filled with fluid is referred to as a vesicle. Vesicles are small, fluid-filled sacs that can develop on the skin due to various causes, including friction, infection, or allergic reactions. They typically measure less than 1 centimeter in diameter and are characterized by their thin, transparent walls which can be seen under the skin.

Understanding the distinction between a vesicle and related skin terms is essential. For instance, a wheal is a raised, itchy area of skin that is often associated with allergic reactions and is typically transient. A macule is a flat, discolored spot on the skin that is larger than a point, while a patch is also flat but greater in size and may involve a different texture or color. Recognizing these differences can help in accurate diagnosis and treatment in a clinical setting.