What term refers to a small, brownish spot on the skin that can vary in color?

The term that refers to a small, brownish spot on the skin that can vary in color is a mole. Moles, also known as nevi, are common skin growths that can range in color from tan to deep brown, and they often develop from clusters of pigmented cells called melanocytes. Moles can be flat or raised, and their appearance can change over time. Importantly, while they are typically harmless, monitoring moles for changes in size, color, or shape is key for early detection of potential skin concerns, such as melanoma.

In contrast, a nodule refers to a larger, solid bump beneath the skin that can be caused by various conditions but is typically not characterized simply as a brown spot. A macule is a flat, discolored area of skin that is usually smaller than a centimeter and does not have any elevation or texture, whereas a mole is often raised. The term lesion is more general and refers to any abnormal tissue change or injury, which can encompass a much wider variety of skin issues beyond just small brown spots.