It depends on the the type of AS, the dosage, the length of the cycle your body's own response to AS, etc... Almsot any AS will give me (or most peop,e for that matter) some acne if run more than 12 weeks
I once ran EQ for 12 weeks by itself at only 350 mg's per week (I think that was the dose - it was about 3 yeras ago) and I got acne on my back, chest and shoulders. It wasn't too bad, but it was noticeable enough to the point where I didn't want to wear a tank top...
D-Bol and Test is a bad combo for most as is Tren (Tren seems to take longer than Test/D-Bol to give me any kind of acne).
It's all about how Androgenic the AS is and how you as an individual respond to those Androgens.