Not Again!!!

GB has another crazy red, pus filled blob on his knee!!! How could this be??? It started as a little red spot. I told him I thought it was an ingrown hair (he'd die if he knew I was sharing this) and day by day it's just getting worse :( Of course it comes to a head (proverbial and literal) today, so that it'll be 2 days before we can get him in to see the doctor. We've been scrubbing, cleaning and peroxide-ing it, then using Neosporin.... and still, it's looking bad. WHY!?!?! I feel sooo bad for him, I know it hurts and he does NOT want me doing all this to torture help him :(
Gonna go slap a warm washcloth on it now. And hope for the best.
(That's what my trusty WebMd.com said to do. And they haven't lied to me before)