If you have any areas on your skin that are darker in colour than the rest of your body then it’s likely that you have hyperpigmentation. These areas can range from the very small to the very large, so everything from freckles to sun spots is classed as hyperpigmentation.
You can get it anywhere on the body, on any skin tone and at any age. It is mainly caused by sun exposure, as the skin reacts and produces more melanin to defend itself. Hyperpigmentation can also be caused by blemishes which heal to leave dark marks on the skin, and your hormones which can fluctuate, especially during pregnancy.