I get it badly too. When you say scrub, are you using something like this?
https://www.amazon.co.uk/Scrubber-H...&qid=1541087999&sr=8-3&keywords=back+scrubber
And antiseptic soap?
https://www.boots.com/toiletries/wa...ights-traditional-coal-tar-soap-125g-10096654
PS how old are you? I used to have fairly bad face acne but that cleared up at 17, I thought the bacne might follow but if anything it's worse now, and I'm 28. It must stop at somepoint right?!

Shower at the gym and ask one of the chaps to help you out from behind.
Star of the film.
Bow chicca wicca bow chicca bow bow chicca
Cast (in order of appearance)
Soap Dropper - MUGnolia
Pipe Fitter - Max Clench
Club Attendant - P. Rolapse
...
Soggy Biscuit eater - Diddums