Porriño-Bustamante María Librada, Arias-Santiago Salvador, Fernández-Pugnaire María Antonia
Department of Dermatology, University Hospital La Zarzuela, Madrid, Spain.
Department of Dermatology, University Hospital Virgen de las Nieves, Granada, Spain.
Int J Trichology. 2021 Nov-Dec;13(6):34-35. doi: 10.4103/ijt.ijt_117_20. Epub 2021 Nov 22.
Pressure alopecia (PA) is an uncommon type of hair loss due to ischemic changes of the scalp, as a result of prolonged immobilization. Clinically, it often appears within the 1 month of the trigger and tends to resolve spontaneously within 4 months. If the duration of the immobilization is longer, irreversible alopecia can be developed. Trichoscopy is usually nonspecific, being black dots, broken, and dystrophic hairs the most frequent findings. However, yellow dots and thin hairs have also been reported. We herein present two patients with PA, one with a recent development and another one with a long-lasting alopecia. Both of them showed keratotic follicular plugs and thin hairs as the main trichoscopic findings.
压力性脱发（PA）是一种不常见的脱发类型，由于头皮缺血性改变导致，是长期固定不动的结果。临床上，它通常在触发因素出现后的1个月内出现，并倾向于在4个月内自发缓解。如果固定时间更长，则可能会发展为不可逆性脱发。毛发镜检查通常无特异性，黑点、断发和营养不良性毛发是最常见的表现。然而，也有报道出现黄点和细发。我们在此报告两名压力性脱发患者，一名是近期发病，另一名是长期脱发。他们两人毛发镜检查的主要表现均为角化性毛囊栓和细发。
