anybody seen this on males with short hair cuts?

[Dejuan42]

have anyone seen like lil knicks on males head where hair wont grow? If so does anyone know what causes it? the last time i cut my hair all the way off i noticed i had a lil circle a lil bit smaller than a dime with no hair

 

[JazzAngel]

Dejuan42 where exactly are you loosing this hair? And, how old are you?