Home > ADHD Glossary of Terms > Patchy Hair LossHairPatchy Hair LossAlopecia areata is mainly identified by the loss of hair in small, round patches. These patches, about the size of a coin, typically appear on the scalp as hair begins to fall out.Related termsAlopecia AreataAlopecia TotalisAlopecia UniversalisAnagen EffluviumAnagen PhaseAndrogenetic Alopecia← Back to full glossary