Alopecia areata - 斑禿
斑禿 (Alopecia areata) 出現在頭皮後面。在典型情況下，它會突然出現，表面完全光滑，尺寸為 2-3 公分。
References
Alopecia areata 是一種免疫系統攻擊毛囊的病症，導致暫時性脫髮而不留疤痕。它可以表現為一片片脫髮或影響整個頭皮或身體，約 2% 的人在生命的某個階段受到影響。罪魁禍首似乎是毛囊周圍自然保護的破壞。
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 是一種免疫系統攻擊毛囊的病症，導致頭皮和身體其他多毛部位掉髮。它影響著全世界大約 2% 的人。雖然它可以發生在任何年齡，但兒童比成人更常見 (1. 92% vs. 1. 47%) 。女性，尤其是 50 歲以上的女性，往往比男性更容易經歷這種情況。 將皮質類固醇直接注射到受影響的區域比局部塗抹效果更好。
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.
斑禿被認為是一種與毛囊免疫系統有關的自體免疫疾病。潛在的機制涉及身體無法識別自己的細胞，隨後免疫介導的毛囊破壞。
○ 治療 - 非處方藥
有些患有輕度斑禿的人無需治療即可在一年內康復。然而，大多數人會在頭皮上的隨機部位復發。
#Hydrocortisone cream
○ 治療
病灶內注射類固醇是最有效的治療方法。如果大面積頭皮受到影響，可以嘗試免疫療法。
#Triamcinolone intralesional injection
#DPCP immunotherapy