lol - you are talking about real life!?!?!? I thought you meant the starfish on your avatar!
You think it is infected? Try some antibiotic cream if you think it is infected. Do a little baking soda with water and dab it on the boil to help clean the area and absorb any swelling too . If it seems to be getting bigger try some warm compresses on the boil ( washcloth soaked in hot water and hold it on the boil until it cools and then warm it up again and hold it on more) for about 20 minutes.
I hope it gets better! Did you get the ingrown hair out?