As the name suggests, ingrown hairs are hairs that curl back under the skin surface instead of breaking through. It happens frequently in areas where the skin is shaved, including the face, legs, and, yes, the pubic region (via Mayo Clinic ). The curly nature of pubic hairs makes them more prone to re-entering the skin after shaving. Typically, an ingrown hair causes a bump that may or may not be pus-filled. It may itch or be painful, and the area around the lump may darken. You may also see the actual hair under the skin. Unlike herpes, ingrown hairs aren't infectious and don't recur on their own.

Ingrown hairs can be treated at home by washing the area gently every day with a washcloth until the hair is released. If the area becomes infected, a doctor may prescribe an antibiotic cream. The best way to avoid ingrown hairs in the groin area is to use non-shaving hair removal techniques such as creams or electrolysis. If you prefer shaving, be sure to wet the area beforehand and use a lubricating shave cream. Avoid pulling the skin area taut when you shave, which is more likely to cause the remaining hair to retract into the skin. Follow up your shave with a moisturizing lotion.