In terms of inches it is 18 to 14 inch.

Cutting out ingrown hair. An infected ingrown hair is the result of a grown-out hair that has curled back into the skin and become infected. Pulling the skin taut during shaving can also cause ingrown hairs since this action permits the cut hair to draw back into the skin and re-enter the skin without first growing out. Normally new hair grows.

Recurrent cases are sometimes called folliculitis. Other times dead skin cells cause a hair follicle to become clogged which leaves the hair no choice but to grow sideways beneath the skins surface. In other words avoid any form of hair removal from your head.

It is most common in people with thick coarse or curly hair types. An ingrown hair is a hair that has curled back into the skin instead of growing out of the skins surface. Shave on clean dry skin with a single.

Unfortunately theres no guaranteed way to prevent ingrown hair.