possible to reverse the effects of Excessive Masturbation?

The only connection between acne & the need to masturbate is that they are both caused by the same thing - hormones. One is not responsible for the other.

The only time when you can say that you have been masturbating excessively is when you find you are causing yourself physical injury.

Nature also stops you from masturbating too much simply by making it too painful to do so, thus forcing you to give it a break for a while.

Forget all the old wives' tales about masturbation causing acne, going blind, hairy palms etc. Just do what comes naturally.