A pimple is a form of which type of lesion?

A pimple is classified as a pustule, which is a type of skin lesion characterized by a raised bump that contains pus. Pustules often result from inflammation or infection of the hair follicles, leading to a collection of dead white blood cells, bacteria, and tissue debris. This pustular formation is typically associated with acne or other skin conditions where bacteria are involved.

In contrast, a vesicle is a small fluid-filled sac, often seen in conditions like herpes or chickenpox. A macule is a flat, discolored area of skin that does not involve any elevation or fluid, while an ulcer is a deeper skin lesion that involves loss of epidermis and part of the dermis, which can occur due to various underlying conditions and infections. Thus, recognizing the specific characteristics that define a pustule helps to understand why a pimple is categorized under this type of lesion.