There are numerous causes for hair loss, or alopecia, which can be largely divide into “scarring” vs. “non-scarring” hair loss.

Scarring hair loss causes include:

• Injury

• Surgery

• Radiation

• Traction (tight curls)

• Central centrifugal cicatricial alopecia

Non-scarring hair loss causes include:

• Telogen effluvium - organic pathology

• Androgenetic alopecia - genetic hair loss

• Alopecia areata - autoimmune factors