What is pain on the bottom of your feet and a rash with pimple like bumps on a 13 year old mean?
Without knowing the full extent of your symptoms, it seems to
that it could possibly be an allergic reaction. If by 'bottom of
your feet' you mean the sole and you walk around the streets with
no shoes on you could have potentially picked up bacteria/fungus
which is triggering this. I'd advise you to go to a doctor if it
doesn't get any better. Online diagnosis are very hard to make.