Trichoscopy Features of Trichotillomania

The document discusses trichotillomania, a type of traction alopecia caused by repetitive hair pulling, and its trichoscopic features. It highlights that trichotillomania can sometimes be clinically and dermoscopically similar to patchy alopecia areata. Key trichoscopic signs of trichotillomania include black dots, coiled or hook hairs, hair shafts of varying lengths with frayed or split ends (known as trichoptilosis), and notably, the absence of exclamation mark hairs and yellow dots, which are typically seen in alopecia areata.