Exclamation mark hair pattern is seen in
Alopecia areata - autoimmune condition Exclamation mark - These are broken hair follicles with broad distal and thin proximal shaft It is pathognomonic of alopecia areata but not always found.
Alopecia areata
Androgenic alopecia
Anagen effluvium
Telogen effluvium
FMGE 2019