How does he know he has an infection as opposed to irritation from a needle and oil in depot?
Especially with test, fever, chills, flu like symptoms may appear on a first cycle, also redness, swelling, and pain can be common.
Usually if you press on the infected area, it will stay indented for a second instead of immediately bouncing back.
Also more important, if he has an infection, what is he planning to do about it? If he thinks he has a dirty bottle of gear, which IMO is very rare, all he has to do is order a syringe filter, 18g pin, 10ml syringe, and a sterile vial from a sponsor, remove the crimp from the bottle, heat it for acouple minutes in a pan on the stove, but make sure crimp and stopper are out or top will blow off. After it's warm, swirl in one direction for a minute, and while warm, filter into sterile vial.
I've seen guys reuse pins, inject old dirty looking gear, all kinds of things and it's very rare that I've seen an abcess or any infection that would make me stop.
Syringe filters are cheap. Get a few and filter every vial you get if you really are concerned, and I would use a different supplier but I doubt it's infected from dirty gear. Maybe from pinning.
Anyway, I personally wouldn't bother with pct after 10 days, no need to add chemicals when he should easily get back to normal in a week or two after the test clears. Definitely doesn't need 25mg of aromisin a day, I can't use that much on a gram of test. It's not a high dose, it's just not needed.
If anything I would run 20mg of nolva for 2 weeks, nolva is pretty mild, I take 10mg on occassion because it good for lipids, actually I switched to Torem but if he wants to stop he can just stop or low dose nolva for a week or two. Personally I think clomid at 50mg is over kill. He's 10 days in, really no need to further alter hormones if he's stopping.