An ingrown hair is a hair that curls back or grows sideways into the skin. It often occurs after shaving, waxing, or plucking. An ingrown hair can cause pain, redness, and swelling.
Ingrown hairs are a common problem, affecting up to 50% of people who shave. They are more likely to occur in people with curly or coarse hair. Ingrown hairs can be treated with over-the-counter medications or home remedies. In some cases, surgery may be necessary.