Personally I dont have a huge acne problem during or post cycle... but as my hormones fluctuate I do get some back acne... I recently started using a Sacylic Acid (spelling?) body scrub and acne treatment and that works fucking AWESOME for me.... VERY little acne to speak of and the shit works fast when one does pop up... its a pretty new thing, it used to be benzoyl peroxide but this new stuff works WAY better for me...
of course depending on the severity of the issue, there are stronger treatments like retin-a and accutane, neither of which i have personal experience with