Abnormality of Skin Morphology Hyperpigmentation Hyperpigmentation of the skin MESH:D017495 Hypermelanoses Excessive pigmentation of the skin, usually as a result of increased epidermal or dermal melanin pigmentation, hypermelanosis. Hyperpigmentation can be localized or generalized. The condition may arise from exposure to light, chemicals or other substances, or from a primary metabolic imbalance. Sufficient SCDO:0000593 Skin Hyperpigmentation Hypermelanosis