Trichoscopy is a helpful tool in the diagnosis and management of hair and scalp disorders.1 Dirty dots have been described as a normal trichoscopic finding in the scalps of 10 of 19 healthy children (53%) between 5 months and 14 years of age.2 None of the children had a preceding hair or scalp disorder. The dirty dots presented as clumped and haphazardly arrayed particulate debris and loose fibers of various colors. They are absent in adults2 and, to our knowledge, have not been reported in people of other ages.
Miteva M, Lima M, Tosti A. Dirty Dots as a Normal Trichoscopic Finding in the Elderly Scalp. JAMA Dermatol. 2016;152(4):474-476. doi:10.1001/jamadermatol.2015.5545