Black dots, broken hairs, flame hairs, yellow dots, Pohl-Pinkus constrictions, tulipoid hairs Circle hairs, pigtail hairs, vellus-like hairs, black and white terminal hairs Targeted therapy Black dots, broken hairs, flame hairs, yellow dots Circle hairs, pigtail hairs, vellus-like hairs Radiotherapy Black dots, broken hairs, flame hairs, yellow dots Circle hairs, pigtail hairs, vellus-like hairs, white cicatricial patches Pemphigus vulgaris Dotted vessels, yellow haemorrhagic crusts, diffuse scaling, erythema Circle hairs, pigtail hairs, vellus-like hairs Localized traumas, infections Black dots, broken hairs, flame hairs, yellow dots Circle hairs, pigtail hairs, vellus-like hairs Alopecia areata Black dots, exclamation-mark hairs, yellow dots, pseudomonilethrix Circle hairs, pigtail hairs, vellus-like hairs, white/pigmented terminal hairs