Alopecia Areata–Hair Loss Symptoms, Types, & Causes | NIAMS
Alopecia areata is an autoimmune disease that causes hair loss, mostly in small, round patches. Learn more about the causes & risk factors.
Alopecia areata | Temas de salud | NIAMS
¿Qué es la alopecia areata? Es una enfermedad que ataca los folículos pilosos (las estructuras de la piel que producen el pelo). En la mayoría de los casos, el pelo se cae en mechones …
Alopecia Areata: Diagnosis, Treatment, and Steps to Take
What is alopecia areata? It is a condition that attacks your hair follicles (they make hair). In most cases, hair falls out in small, round patches.
Alopecia Areata: Research & Resources
Alopecia areata is an autoimmune disease that causes hair loss, mostly in small, round patches. Learn more about the causes & risk factors.
Site Search | NIAMS
What is alopecia areata? It is a condition that attacks your hair follicles (they make hair). In most cases, hair falls out in small, round patches.
Skin Diseases, Conditions, & Disorders | NIAMS
Jun 5, 2025 · Find information on diagnosis, treatment, and prevention for skin conditions caused by allergies, irritants, genetic makeup, certain diseases, immune system problems and more.
All Diseases and Conditions | NIAMS
Jun 5, 2025 · Alopecia Areata What is alopecia areata? It is a condition that attacks your hair follicles (they make hair). In most cases, hair falls out in small, round patches.
Autoimmune Diseases - Overview and Types | NIAMS
Mar 22, 2023 · Types of Autoimmune Diseases There are several types of autoimmune diseases. These include the following. Alopecia areata happens when the immune system attacks hair …
Newsroom | NIAMS
The NIAMS Newsroom has the latest on our supported research in bone, joint, muscle and skin health and diseases.
Site Search | NIAMS
What is alopecia areata? Alopecia areata is a disease that causes hair loss. In alopecia areata, the immune system attacks the structures in skin that form hair (hair follicles). Alopecia areata …