My Dd has had a couple. I recommend a reasonably hot bath, it softens the skin and if it is ready just wiping it with a facewasher can do the trick, sometimes a little pick, but i found that with boils there is so much gunk in there that they just need a little encouragement. I wouldn't squeeze it too hard, just gently, and then do the same tomorrow night.
Also get yourself some chlorhexadine wash from the pharmacy and wash him in that for a few days, particularly up his nose as that is where the bacteria that cause boils like to live. Boils suck.

BR- mum used to use Thars! Magnoplasm is another that is easy to get from a pharmacy. Pop a big slathering under a band-aid overnight.