Doesn't really do anything with cystic acne but has helped with smaller ones. I use it at night and take it off the next morning. It's fascinating to see that it's turned white exactly where it touched the pimple.

Not sure why, but it works great on some days and doesn't do anything on others. I do see results so I've purchased multiple packs. I wish each pack came with more. I like that they come in different sizes and it blends very nicely with your skin (even though I only wear it while I sleep). Highly recommend if you're prone to occasional breakouts.