A blemish is a small mark or flaw on the skin, often caused by acne, scars, or other skin conditions. These imperfections can vary in size and color, and they may appear on different parts of the body. Blemishes are common during adolescence but can affect people of all ages. In addition to skin blemishes, the term can also refer to imperfections in other contexts, such as a blemish on a piece of furniture or a blemish in a product's quality. Addressing blemishes often involves skincare routines or treatments to improve appearance and boost confidence.