Abstract
Pigmentary demarcation lines (PDLs) are areas of an abrupt transition from hyperpigmented to hypopigmented or normal skin color. They are seen on limbs, face, and sometimes trunk. They are common in the black race. There are eight groups of PDL A to H. Facial PDL should be differentiated from melasma and postinflammatory pigmentation over the face. PDL are common in black women during pregnancy and are considered to be normal variants of pigmentation. Etiology of PDL continues to be an enigma and needs further research. PDL in pregnancy may regress spontaneously after delivery and do not require treatment. Facial PDL have a persistent course posing cosmetic concern for the patient and a challenge for dermatologist.
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