Caution With Hair Dye: Foreign Body Skull Erosive Granuloma From Exogenous Hair Pigmentation

This document reported a rare case of a 40-year-old man who developed a foreign body granulomatous reaction leading to skull bone erosion after using hair dye. The patient presented with a tender scalp lump, and imaging revealed skull erosion. Surgical excision and histology confirmed the reaction to hair dye substances. This case highlighted the potential for hair dye to cause granulomas that mimic malignant lesions, emphasizing the importance of considering hair dye use in patients with suspicious scalp lumps. The authors advised caution with hair dye use and recommended that medical professionals inquire about hair dye history in similar cases.