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Background
Pigmented contact dermatitis (PCD), a rare variant of non‐eczematous contact dermatitis, is clinically characterized by sudden‐onset brown or grey pigmentation on the face and neck. It is hypothesized to be caused by repeated contact with low levels of allergens.
Objectives
This study evaluated the risk of using hair dyes in patients with PCD in Korea.
Methods
A total of 1033 PCD patients...