If it is a boil (which are common wherever there are hair follicles), then u may want to get it looked at by a doctor. In the mean time...Do not sueeze it!!! Put warm compresses on the area...The heat will help to start breaking the puss up. Aslo, put honey (i know, sounds weid, and gross, but trust me it works) on the boil, and let sit for several minutes. Do a warm compress again after the honey. Do this several times during the day, and chances are by evening, the boil will be ready to start oozing. Pull the skin away from the boil to see if it wil pop...Do not squeeze..Gently pull the skin away. If stuff comes out, great, if not, continue the hot compress and honey. Just dab the icky stuff with a tissue (its really nasty and gross...Green and yellow stuff...Super nasty, so beware) whatever you do, do not use anything with an alcohol base (ie rubbing alcohol) because that will seperate the puss under the skin, and make it worse by spreading. Also, keep polysporne on and around the boil. This will help prevent further spread as boils are highly contagious.
Good luck. These things hurt like hell. I have had 2 before...They are gross and really really sore. The sooner it is taken care of, the better.