Focal hair loss

14: Focal hair loss


Hair loss is divided into focal hair loss and diffuse hair loss. This chapter reviews common causes of focal hair loss, including alopecia areata, trichotillomania, discoid lupus, traction alopecia, and central centrifugal cicatricial alopecia.

Key terms:

alopecia areata


discoid lupus

traction alopecia

central centrifugal cicatricial alopecia

folliculitis decalvans

Alopecia areata

Rana Abdat

Clinical features

Alopecia areata (AA) is a common cause of hair loss that affects men and women equally and can affect patients of all ages.

Differential diagnosis

The differential for AA includes tinea capitis, AGA, trichotillomania, TE, anagen effluvium, and psychogenic pseudoeffluvium.


Work-up for AA is divided into history taking, clinical examination, and laboratory work-up.

History taking

Jul 22, 2021 | Posted by in Dermatology | Comments Off on Focal hair loss
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