K.H.
My son is not cir'd and the doctor told us NOT to gently pull the skin back as other's have suggested. You run the risk of hurting him, causing tears, etc. Call your doctor and talk to a nurse. What I would do is let him run around without a diaper and let the area air out. Then just wash it like normal and put a bit of vasoline on it so it doesn't stick to his diaper. It should clear up in no time.
p.s. there is no medical need to get him cir'd.