Overview
Acrodermatitis enteropathica
Definition and Mechanism
Alopecia areata is a chronic autoimmune condition characterized by sudden, non-scarring hair loss. It occurs when the immune system erroneously targets hair follicles, resulting in hair loss that can occur on any hair-bearing part of the body. The term “alopecia” refers to hair loss, while “areata” denotes the patchy nature of the condition. Although it can affect individuals of any age, gender, or ethnic background, it commonly manifests during childhood or early adulthood.
Types of Alopecia Areata
- Patchy Alopecia Areata: The most common form, featuring round or oval patches of hair loss on the scalp or other body parts.
- Alopecia Totalis: Complete loss of all scalp hair.
- Alopecia Universalis: Complete loss of hair on the scalp, face, and body.
- Alopecia Ophiasis: Band-like hair loss pattern along the sides and lower back of the scalp.
- Alopecia Barbae: Patchy hair loss in the beard area.
