This is a great mask. But it is not going to make a miracle or clear your skin in one day. I have severe acne problem - I got breakout pretty much every where on my face...... I apply this mask on my face and it will help to calm the breakout. Put thinner layer because it feels like burning (only feels like not really burning your skin). It is stronger enough so it may cause your skin to dry up a little and then peel a little, you can put on moisturizer to manage the flakes. I always have this mask on my shelf and can't live without it now. It would not help much on giant cystic acne. But you should give it a try if you have serious acne issues that never got fixed.