Which type of skin lesion is characterized by raised bumps filled with clear fluid?

The type of skin lesion characterized by raised bumps filled with clear fluid is a vesicle. Vesicles are small, fluid-filled sacs that typically arise from conditions such as infections, allergies, or irritations. They are generally less than 0.5 cm in diameter and can occur in clusters or as solitary lesions on the skin. The clear fluid inside a vesicle is often serum, and when the vesicle ruptures, it can lead to weeping or crusting of the skin.

A pustule, while also a raised bump, is filled with pus rather than clear fluid, indicating infection or inflammation. Wheals, on the other hand, are raised, itchy areas of skin that are often a result of an allergic reaction and contain fluid but are usually transient. Macules are flat discolored patches on the skin without elevation, so they do not contain any fluid at all. Understanding these distinctions helps identify and treat different skin lesions appropriately.