Here are 3 noteworthy things you should know about hyperpigmentation. (1) Hyperpigmentation can appear anywhere. You may notice dark spots mostly on your face and chest, but that's because those are areas that get the most sun exposure. (2) Several things can cause this skin issue. Hyperpigmentation is the result of damage and trauma that accumulate on your skin over time. They can be due to hormones, sun exposure, acne, pregnancy, injury, or genetics. (3) Exfoliating can treat or cause them. If you have a light case of hyperpigmentation, using a gentle scrub can help treat it. However, if you use abrasive products or are too vigorous when scrubbing, you can cause inflammation, which can lead to more dark spots.