I found that the best way to get rid of razor burn was to rub some ice on it or put a cold cloth. I'm not sure if this is medically the best way, but it seems to work for me. As for an ingrown hair, the quick and dirty way is to use a needle and some tweezers to get it out. If ingrown hairs become a recurring issue, you may want to get some Clearhead or TendSkin.