you should run forma 8 weeks and then take at least 4 weeks off from it... you absolutely don't want to run it too long because it can become suppressive and you don't want to completely eliminate all the estrogen from your body... its meant to control estrogen when on cycle...
you can rub it on your chest and abs... those are the two spots to use it...
and fuck yes it will help with reducing puffiness... its a strong ass AI so fuck yeah man! =)