Yeah, I hear ya. You figured you were done with acne, right? Well, there are many reasons for acne. One, is that your skin is a bit more oily and you are over cleansing it, thus stripping out the natural oils keeping your skin moisturized. Over production of oils then happens, causing acne. Be more gentle with your cleansing routines.
Hormones might be at play here. If your acne is most often on your lower chin and jaw line this is an indication of that. This is highly beneficial for many types of hormonal issues (for women anyway). Fem up