As the name suggests, an ingrowing hair is a hair that has grown back into the skin. Ingrown hairs can become inflamed and may look like a spot. They may also itch and be tender to the touch. They tend to occur when hairs have been shaved, plucked or waxed and are more common in people with curly hair or in areas such as the bikini line where the hair is coarse and curly.
An ingrown hair occurs when a hair curls back under the skin as it is growing. This results in a spot-like bump appearing on the surface of the skin. Most ingrown hairs are completely harmless and will resolve themselves but in some cases the area can become "angry", inflamed and pussy, much like a spot. This happens when the hair follicle becomes infected.
You can get an ingrown hair anywhere on the face or body where you have hair growth but they are far more common in areas such as the bikini line or areas that are regularly shaved or waxed such as the underarms or legs or the face.
Anyone can get ingrowing hairs and most people will have one at some point in their life.