What is a Papule?

A papule is defined as a small, red elevated protrusion on the skin that does not contain pus. It typically measures less than 1 centimeter in diameter and is often a sign of inflammation or irritation. Papules can be associated with various skin conditions, such as acne or dermatitis, where they may appear as part of the body's response to an irritant or infection.

In contrast to options that describe other types of skin lesions, such as inflamed pimples with pus or blisters, a papule is characterized by its solid, elevated nature without any fluid-filled content. The lack of pus differentiates papules from pustules, which are inflamed lesions specifically containing pus. Moreover, papules are not classified as pigmented areas on the skin, which are typically referred to as macules or other types of marks. This distinction makes option B the only accurate description of what constitutes a papule.