Exclamation mark hair pattern is seen in
Alopecia areata
Androgenic alopecia
Anagen effluvium
Telogen effluvium
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.
FMGE 2019