In Reply To:
Unfortunately for ST, we need more information.
Chaffing, saddles sores and blisters are all completely different.
My "guess" is that you have a saddle sore, which is pretty much like a blood blister meets pimple. Just bite a bullet, squeeze it as HARD as you can and watch the blood squirt across the room while you scream like it's your first horror movie. Repeat a few times, put some zit medicine on it and go to bed. It will need another squeeze in the morning and then you'll be fine.
Longer term...figure out the root of the problem (high seat, bad shorts, use of cream/ASSOS/etc, bad form, etc)
Sounds like a great way to incite a case of Fournier's Disease-
http://www.google.com/...mp;ct=image&cd=1