There are two possibilities That
I can think of.First is of folliculitis.Secon
d is of acne keloidalis nucahe. Folliculitis is the inflammation
e or more hair follicles. The con
may occur anywhere on
the skin.Acne keloidalis nuchae occurs when hairs on
the head and
neck grow into the skin, become inflamed, and
cause scar tissue.
I would suggest That
you get it evaluated from a dermatologist as treatment is different for both.
Hope it helps.