Which of the following describes a papule?

A papule is defined as a small, raised lesion on the skin that is typically less than 1 cm in diameter and does not contain any fluid. This definition aligns perfectly with the characteristics outlined in the chosen answer. Papules often present as solid, elevated bumps and can be seen in various dermatological conditions, such as acne or dermatitis, where they are formed due to the accumulation of cells or inflammatory processes.

In contrast, the other options describe different types of skin lesions. For instance, a flat lesion greater than 1 cm would typically be classified as a patch or plaque, not a papule, while a raised lesion greater than 1 cm that is fluid-filled describes a blister or cyst. Finally, a flat lesion less than 1 cm does not fit the criteria for a papule, as it lacks the raised characteristics fundamental to this type of lesion. Understanding these distinctions is crucial for accurate identification and diagnosis in physical assessments.