* Age Spots, also called liver spots or solar lentigines, are brown or black spots that appear on skin due to sun overexposure. They commonly appear on the face and hands, or on sun-exposed areas of the body.
* Melasma, also called chloasma or "the mask of pregnancy", are large patches of darkened skin occurring in pregnant women or those taking birth control pills. They often appear on the forehead, face, and stomach.
* Post-inflammatory hyperpigmentation are spots or patches of darkened skin that appear after a skin condition, such as acne or eczema. They usually affect the face or neck.