So I'm in my mid 20's and have never really had a problem with breakouts. The past 6 weeks or so I have been breaking out constantly.

I found a little pimple on. my. knee. Wtf. I literally have no idea how to deal with them, and some of the more recent ones I've gotten are the really tender/painful angry red looking ones. Nothing in my routine has changed, and I'm really bummed out and self conscious. The areas of concentration are my upper back and my boobs/chest. Halp.

I have some benzoyl peroxide but it's kind of old so it might have expired. But that never really helped and neither did salicylic acid. My skin is INSANELY sensitive, so I have a very limited skincare regimen.