Uneven skin tone refers to areas of the face or body where pigmentation is darker, lighter, or more intense than surrounding skin, resulting in blotchiness, patches, or an overall dull appearance. Common causes include sun exposure, age, hormonal changes, inflammation from acne or rosacea, and post-inflammatory hyperpigmentation. Genetics also play a role in how melanin is distributed across the skin. The specific cause and pattern of unevenness varies by individual and affects how different approaches may work.