Alopecia areata - 斑秃
斑秃 (Alopecia areata) 出现在头皮后面。在典型情况下，它会突然出现，表面完全光滑，尺寸为 2-3 厘米。
References
Alopecia areata 是一种免疫系统攻击毛囊的病症，导致暂时性脱发而不留疤痕。它可以表现为一片片脱发或影响整个头皮或身体，约 2% 的人在生命的某个阶段受到影响。罪魁祸首似乎是毛囊周围自然保护的破坏。
Alopecia areata is an autoimmune disorder characterized by transient, non-scarring hair loss and preservation of the hair follicle. Hair loss can take many forms ranging from loss in well-defined patches to diffuse or total hair loss, which can affect all hair-bearing sites. Patchy alopecia areata affecting the scalp is the most common type. Alopecia areata affects nearly 2% of the general population at some point during their lifetime. A breakdown of immune privilege of the hair follicle is thought to be an important driver of alopecia areata.
Alopecia areata is an autoimmune disorder characterized by transient, non-scarring hair loss and preservation of the hair follicle. Hair loss can take many forms ranging from loss in well-defined patches to diffuse or total hair loss, which can affect all hair-bearing sites. Patchy alopecia areata affecting the scalp is the most common type. Alopecia areata affects nearly 2% of the general population at some point during their lifetime. A breakdown of immune privilege of the hair follicle is thought to be an important driver of alopecia areata.
Alopecia areata 是一种免疫系统攻击毛囊的病症，导致头皮和身体其他多毛部位脱发。它影响着全世界大约 2% 的人。虽然它可以发生在任何年龄，但儿童比成人更常见 (1. 92% vs. 1. 47%) 。女性，尤其是 50 岁以上的女性，往往比男性更容易经历这种情况。 将皮质类固醇直接注射到受影响的区域比局部涂抹效果更好。
Alopecia areata is an immune-mediated condition leading to non-scarring alopecia of the scalp and other hair-bearing areas of the body. It affects up to 2% of the global population. It can affect all ages, but the prevalence appears higher in children compared to adults (1.92%, 1.47%). A greater incidence has been reported in females than males, especially in patients with late-onset disease, defined as age greater than 50 years. Intralesional injection of corticosteroids has been reported to lead to better responses compared to topical steroids.
Alopecia areata is an immune-mediated condition leading to non-scarring alopecia of the scalp and other hair-bearing areas of the body. It affects up to 2% of the global population. It can affect all ages, but the prevalence appears higher in children compared to adults (1.92%, 1.47%). A greater incidence has been reported in females than males, especially in patients with late-onset disease, defined as age greater than 50 years. Intralesional injection of corticosteroids has been reported to lead to better responses compared to topical steroids.
斑秃被认为是一种与毛囊免疫系统有关的自身免疫性疾病。潜在的机制涉及身体无法识别自己的细胞，随后免疫介导的毛囊破坏。
○ 治疗 - 非处方药
有些患有轻度斑秃的人无需治疗即可在一年内康复。然而，大多数人会在头皮上的随机部位出现复发。
#Hydrocortisone cream
○ 治疗
病灶内注射类固醇是最有效的治疗方法。如果大面积头皮受到影响，可以尝试免疫疗法。
#Triamcinolone intralesional injection
#DPCP immunotherapy