B.M.
Hi M.,
First of all, What does the Dr say it is? If it's not something to worry about then just treat it like a normal abcess.
Is he allergic to Iodine? If not, go to the pharmacy and get a tub of IODEX Salve. It looks terrible, but it's just Iodine in a Petroleum Jelly Base. I've used it for any cuts, scrapes & abcesses since both my Boys were small and they're both in their 40's now! It's a great Disinfectant TOO. Stops infection before it starts. LOL
All it does is draw the pimple to a head faster and eases the pain while it does it. Just put a dab on one of the little circular bandaids and leave it on overnight while he's asleep. You may have to do it for several nights but it will soften the pimple and the head will come off on the Bandaide. Hope this helps!
B.