If you are still serving pop down to the MRS and ask one of the Scab Lifter to sort it for you (but don't get fooled into having your piles checked as well), or have a session in the NAAFI Bar/Squadron Bar/Mess and after a lot of scoops get one of the more sober troops to do the deed for you.
Don't do what one of my Toms did when drunk, and self treat himself after he thought he had the clap with a combination of white spirit, petrol, Dettol and antiseptic cream.
The above 'combo' was not the problem apart from stinging a bit at the time of self treatment. Its the fact he was smoking and when he leaned over to check the results of his self medication, the lot went up in flames.
The MO stated he did not have the clap to start with and the resulting burns would probably prevent him catching a dose for some considerable time to come.
Get some permanganate of potash from your local pharmacy. Only half a dozen crystals in a bowl of hot water, get your toe in and leave it while you watch CeeBeebies then make sure you dry very well, bang on some talc and repeat until blister goes on leave. Course by now you could have hit it with a hammer but you sound like a softie so we'll let you off..as long as you don't start crying.
Got on under each big toe after a 26 mile tab. Didnt realise, just had a load of pressure on my toe and went to clip the nail of one, when all the fluid burst out. Dug at the other after that until it popped. I've lost both toenails though.
Leave it alone and it'll go away eventually OR cut a V shaped snip into the nail so it reached the blister which you can then pop - packed with savlon cream and cover with a plaster - if you have a wife or g/f handy she will probably pay for the opportunity to operate on you - for some reason they love this sort of thing.
I know, when I was at Uni I woke up (hungover as fück, after a night on the lash) to a strange "stabbing" sensation in my back. My girlfriend (at the time - and now wife) had decided that she didn't like the look of a mole on my back, so decided to remove it, using only a nail file and (topically) a set of toenail clippers. To say I was unimpressed was an understatement.
I got my own back a few weeks later, when she'd tied me (naked and blindfolded) to a chair and was teasing me using only her mouth, hands and a feather-duster - she got a bit carried away and I managed to nut her, right on the bridge of her nose - breaking it..
Even now nearly twenty years later she'll still occasionally refer back to me breaking her nose (of course when we're in company), but going all shy as to the circumstances. The minx.
I had an INTERNAL blister under the pad of my heel, made me eyes water that ruddy did, a kindly medic syringed out a gallon of fluid, then syringed in a gallon of tincbenz, got me down off the ceiling , then straight back on P company.