A hair is a specialized structure, made of a protein called keratin, which grows from the skin cells of mammals. Even though some spiders or caterpillars may be described as "hairy," only mammals have ...

Many people deal with ingrown hairs on the legs, armpits, bikini line, chin, neck, and even the stomach. If you shave, wax, tweeze, thread, or use hair-removal creams, chances are you’ve experienced ...