What type of lesion is characterized as flat and discolored?

A macule is a type of lesion that is defined as a flat area of discoloration on the skin. It is distinguished by its lack of elevation or depression in relation to the surrounding skin, meaning it does not protrude but instead is flush with the skin’s surface. Macules can vary in size and color, which makes them identifiable as flat, distinct spots that do not have texture differences compared to the skin around them.

In contrast, a nodule is typically raised and often deeper than other skin lesions, representing a solid lesion that can penetrate the dermis. A papule is also raised but is generally smaller than a nodule and is usually firm to the touch, indicative of its solid nature. A vesicle is a fluid-filled lesion with a raised appearance, often caused by blisters or other conditions where fluid accumulates under the skin. Each of these options represents a different type of skin lesion, but a macule specifically fits the criteria of being flat and discolored.