Lentigo simplex is a benign skin condition characterized by small, flat, brown spots that appear on sun-exposed areas of the skin. These spots are caused by an increase in melanin, the pigment responsible for skin color, and are more common in older adults. They are usually painless and do not require treatment unless for cosmetic reasons. The condition is often confused with other skin lesions, such as freckles or age spots, but lentigo simplex is distinct due to its uniform color and shape. While it is not harmful, individuals are encouraged to monitor any changes in their skin and consult a dermatologist if they have concerns.