What is a papule?

A papule is characterized as an elevated, solid lesion that measures less than 0.5 cm in diameter. This definition is essential for understanding the various forms of skin lesions and their distinguishing features in dermatological examinations.

Papules are typically firm, raised structures that can occur in various dermatological conditions, such as acne, psoriasis, or dermatitis. Due to their solid composition and limited size, they can be felt on the skin and may vary in coloration, texture, and cause depending on the underlying condition.

In contrast to other types of lesions:

• A flat, discolored spot on the skin describes a macule, which lacks elevation and is instead defined by a change in color.
• An elevated, fluid-filled lesion refers to a vesicle or bulla, which contains fluid rather than being solid.
• A thickened area of skin can refer to a plaque or lichenification, which involves an increase in skin thickness due to chronic irritation or inflammation.

Understanding the specific characteristics of a papule is crucial for accurate diagnosis and treatment in clinical practice.