Inflamed ingrown hair, also known as pseudofolliculitis barbae, is a common skin condition that occurs when shaved or plucked hair curls back and penetrates the skin. It is often accompanied by redness, swelling, and irritation and can be a painful and unsightly problem.
Inflamed ingrown hairs are particularly common in people with coarse or curly hair and can affect any area of the body that is shaved or plucked, including the face, neck, underarms, and legs. The condition can be caused by a variety of factors, including shaving too closely, using dull razors, or shaving against the grain.