Results : In alopecia areata (AA) , most of examination hairs were exclamation mark-shaped hair, others were trichoptilosis, degrec of finish hair,trichorrhexis nodosa,hair cuticle damage; 结果:经统计斑秃(AA)的生长期脱发是以感叹号样发为主,伴断发时可见有羽状脆发、偶见粗细段发、结节状脆发或伴有毛小皮损伤;