Sulphur products are great for more severe types of acne, including cystic acne. Sulphur doesn't exactly get rid of your acne, at least not by itself, but the way I see it, it "converts" your acne into run-of-the-mill zits. All of my cysts were gone after only two weeks of using sulphur soap and I used to have at least 2 or 3 active cysts all the time. Bar soap tends to be a lot harsher on the skin than liquid soap. Sulphur shampoo is great for scalp acne (it seems like it keeps it under control most of the time), but if you can't get your hands on any, you can use sulphur soap (yes, even bar soap) to wash your hair. I wholeheartedly recommend using sulphur products to help keep your acne under control.