概述

毛发角化病是一种可导致干燥、粗糙斑块和微小疙瘩的无害且常见的皮肤状况,通常发生在上臂、大腿、脸颊或臀部。这些肿块通常不痛也不痒。

毛发角化病通常被认为是正常皮肤的变异现象。这种疾病尚无法治愈或预防。但您可以涂抹润肤霜和处方药膏协助改善皮肤的外观。这种疾病通常会在 30 岁之前消失。

症状

毛发角化病可能发生在任何年龄段,但在幼儿中更为常见。体征和症状包括:

  • 无痛感的小疙瘩,通常发生于上臂、大腿、脸颊或臀部
  • 小疙瘩处的皮肤干燥、粗糙
  • 病情会在换季导致湿度变低和皮肤变干时加重
  • 像砂纸一样的疙瘩,看起来像鸡皮疙瘩

何时就诊

毛发角化病通常无需治疗。但如果您担心自己或孩子的皮肤的外观,请咨询您的家庭医生或皮肤病专家(皮肤科医生)。医生通常会通过检查皮肤和特征性鳞屑疙瘩来作出诊断。

When to see a doctor

Treatment for keratosis pilaris usually isn't necessary. But if you're concerned about your or your child's skin, consult your family doctor or a specialist in skin conditions (dermatologist).

病因

毛发角化病是由角蛋白积聚引起的,而角蛋白是一种硬蛋白质,可以防止皮肤受到有害物质侵害和感染。角蛋白会形成鳞状堵塞物并阻塞毛囊的开口。通常会形成很多堵塞物,导致成片的皮肤变得粗糙、凹凸不平。

目前尚不清楚角蛋白为何积聚。但它的出现可能与遗传性疾病或者特应性皮炎等其他皮肤疾病有关。皮肤干燥通常会加重这种疾病。

Jan. 13, 2022
  1. AskMayoExpert. Keratosis pilaris. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2014.
  2. Keratosis pilaris. American Osteopathic College of Dermatology. http://www.aocd.org/skin/dermatologic_diseases/keratosis_pilaris.html. Accessed Nov. 4, 2015.
  3. Keratosis pilaris. Merck Manual Professional Version. http://www.merckmanuals.com/professional/print/dermatologic_disorders/cornification_disorders/keratosis_pilaris.html. Accessed Nov. 4, 2015.
  4. Keratosis pilaris. American Academy of Dermatology. https://www.aad.org/dermatology-a-to-z/diseases-and-treatments/i---l/keratosis-pilaris/who-gets-causes. Accessed Nov. 4, 2015.
  5. Goldsmith LA, et al., eds. Keratosis pilaris and other inflammatory follicular keratotic syndromes. In: Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed Nov. 4, 2015.
  6. Dermatologists' top 10 tips for relieving dry skin. American Academy of Dermatology. https://www.aad.org/dermatology-a-to-z/health-and-beauty/general-skin-care/dry-skin-tips. Accessed Nov. 4, 2015.
  7. Retin-A. U.S. Food and Drug Administration. http://www.accessdata.fda.gov. Accessed Nov. 5, 2015.
  8. Goldsmith LA, et al., eds. Epidermal growth and differentiation. In: Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed Nov. 5, 2015.