Ingrown hairs can be quite annoying. While they typically do not stick around for a long time, they can easily re-occur in areas of skin that you are regularly irritating (in this case shaving). This is an issue that you could bring up with your primary care physician
. He or she will be able to take a more detailed history and examine you rule out anything other possible skin condition. Ingrown hairs are actually tiny skin abscess
. Basically, the hair follicles that are shaved can get plugged up with oil, dirt etc, and bacteria find this enclosed space a haven to grow. Usually your skin passes the infection in a matter of days to weeks, but they can come back. The simplest thing you could try is to switch methods of shaving. If you are using a razor, try out an electric shaver and vise-versa. Everyone's skin is a little different and yours might be sensitive to your method of shaving. If you have recently started using a new shaving cream, soap, shampoo, or lotion, I would switch back to what you were using before. You should always have a primary care physician you see for health care maintenance and if you don't have one right now you can use this as an excuse to find one. Good luck.