<unk>  is a condition where a hair curls back or grows sideways into the skin. The condition is most prevalent among people who have coarse or curly hair. It may or may not be accompanied by an infection of the hair follicle (folliculitis) or "razor bumps" (pseudofolliculitis barbae), which vary in size. While<unk>  most commonly appears in areas where the skin is shaved or waxed (beard, legs, pubic region), it can appear anywhere. Anything that causes the hair to be broken off unevenly with a sharp tip can cause<unk> s.<unk> s are also caused because of lack of natural exfoliation in the skin.
Ingrown hair
Kinking hair
Hair whorl
Skin bridge
Dieuches
Cracked nipple
Teething
Estrogenic fat