A blister or elevation filled with fluid, not pus, is referred to as what?

A blister or elevation filled with fluid, not pus, is referred to as a vesicle. Vesicles are small, fluid-filled sacs that can develop on the skin or mucous membranes, and they often indicate a variety of conditions, including viral infections or allergic reactions. The fluid within a vesicle is typically clear, differentiating it from other types of skin lesions.

In contrast, other terms for skin lesions refer to different characteristics. For example, pustules are similar elevations but contain pus, which is often a sign of infection. Papules are small, raised lesions that do not contain fluid and are typically solid. Macules are flat, discolored spots on the skin that do not have any elevation. Understanding these distinctions helps in the clinical assessment and diagnosis of various dermatological conditions.