There are several types of hyperpigmentation, the common ones being melasma, sunspots, and post-inflammatory hyperpigmentation.   Melasma. Melasma is believed to be caused by hormonal changes and may develop during pregnancy. Areas of hyperpigmentation can appear on any area of the body, but they appear most commonly on the stomach and face.   Sunspots. Also called liver spots or solar lentigines, sunspots are common. They’re related to excess sun exposure over time. Generally, they appear as spots on areas exposed to the sun, like the hands and face.   Post-inflammatory hyperpigmentation. This is a result of injury or inflammation to the skin. A common cause of this type is acne.