What is the widespread condition called that involves patchy skin color due to pigment loss?

The condition characterized by patchy skin color due to pigment loss is known as leukoderma. This term describes multiple forms of depigmentation or skin discoloration where the skin loses its natural pigment, leading to lighter patches on the skin. This can occur due to various factors, including autoimmune diseases, skin trauma, or genetic predispositions.

In contrast to the other options, cellulitis refers to a bacterial skin infection that results in swelling and redness rather than pigment changes. Psoriasis is a chronic skin condition that manifests in the form of red, scaly patches and is linked to accelerated skin cell proliferation, not pigment loss. Chloasma, also known as melasma, involves dark patches on the skin, often influenced by hormonal changes, which again is the opposite of what leukoderma presents. Understanding these distinctions helps clarify why leukoderma is the appropriate term for this condition.