Final answer:
A papule is a small, solid, raised bump on the skin, typically less than one centimeter in diameter, and not filled with fluid. It's essential to watch for changes in papules since some skin changes could signal conditions needing medical attention, such as skin cancer.
Step-by-step explanation:
A papule is defined as a small, solid, raised bump on the skin that does not contain fluid. It is typically less than one centimeter in diameter and can appear in a variety of shapes, colors, and sizes. Papules are commonly associated with conditions such as acne, where they represent an inflamed hair follicle, or could be part of a skin reaction to various irritants. However, unlike some other skin lesions, they are not pus-producing. It's important to monitor changes in the skin, such as the growth or change in appearance of papules and other skin lesions, as some may be indicative of skin conditions that require medical attention, like skin cancer.
Skin cancers, for example, can be identified using the mnemonic ABCD, which stands for asymmetry, border irregularity, color variation, and diameter. While papules might not necessarily exhibit all these characteristics, any notable changes in appearance should be evaluated by a healthcare professional.