Is there anything that can happen to you such as bacterial infection that may cause you to relapse getting acne back 4 months after accutane?

Yes: Don't look for an explanation. If your acne is back, get seen again. Best wishes.

Happens anyway: It is not rare for someone to need more than one course of accutane before this problem is gone for good. Although some look at acne as a transitional problem of the teen years some are fighting it into their late 30's.If it happens you deal with it.