Causes and Symptoms
There are several different types and causes of hyperpigmentation, including liver spots (solar lentigines), age spots (seborrheic keratoses), freckles, melasma, and post-inflammatory hyperpigmentation. These last dark spots can be caused by the inflammation resulting from an initial skin condition like acne, folliculitis, a bug bite, or an injury. Some types of hyperpigmentation, like seborrheic keratoses and lentigines, are genetic and increase in number with age or sun exposure.
Sun exposure is a risk factor in the development and/or exacerbation of most causes of hyperpigmentation.
A provider will examine the skin to diagnose the type of hyperpigmentation and determine an appropriate treatment.
*Source: American Osteopathic College of Dermatology