The document provides an overview of hyperpigmentation disorders. It outlines topics that will be covered including the color of skin, common terminology, diagnostic process, and hyperpigmentation disorders relevant to esthetic dermatology. Specific disorders discussed include melanocytic hypermelanosis, melanotic hypermelanosis, dermal melanocytosis, dermal melanosis, lentigines, partial unilateral lentiginosis, freckles, Riehl's melanosis, nevus of Ota, nevus Hori, melasma, post-inflammatory hyperpigmentation, exogenous ochronosis, and erythema dyschromicum perstans. Each disorder is defined by characteristic descriptions and appearance of lesions