Hair loss can occur for many reasons, and sometimes dermatologists recommend a scalp biopsy to identify the exact cause. A biopsy helps specialists examine hair follicles and surrounding tissue under a microscope, providing valuable information for accurate diagnosis and treatment planning.

An alopecia areata skin biopsy is commonly performed when doctors suspect autoimmune-related hair loss or unusual scalp conditions. During the procedure, a small sample of scalp skin is removed using local anesthesia and sent to a laboratory for analysis.

Biopsy results can reveal whether hair loss is caused by inflammation, autoimmune reactions, fungal infections, scarring alopecia, or hormonal changes. Dermatologists use these findings to determine the most effective treatment strategy for each patient.