What type of skin lesion is defined as a small blisterlike elevation filled with serous fluid?

A vesicle is defined as a small blisterlike elevation that contains serous fluid. These lesions typically measure up to 1 cm in diameter and can arise from several conditions, including viral infections, allergic reactions, or other dermatological ailments. The fluid inside a vesicle is usually clear, distinguishing it from other types of lesions like pustules, which contain pus and are associated with infections or inflammatory processes.

In contrast, pustules are characterized by being filled with pus rather than serous fluid. Excoriations are superficial scratches on the skin, while papules are solid, raised lesions that are usually less than 1 cm in diameter and do not contain fluid. Understanding these distinctions is essential in clinical practice for accurate assessment and diagnosis of various skin conditions.