Just popped into this thread for the first time to see what is in stall for me - and could not help replying .... I have noticed little pimples on my upper arms and on "one" (not both?) sides of my neck - I'm doing the following which seems to help....

use a loofer to scrub off / exfoliate dead skin
use teatree oil (diluted) on a cotton sponge and wipe over infected area
I do this every day....

it has improved about 80% in the last week since I have been doing this... I would not normally bother but I'm getting married in four weeks so do not want bumpy arms!

I hope this helps you too