I have struggled with PMS cystic acne on my chin for years. While I know my hormones have always had a factor in this, I also believed that my chin was prone to being clogged with oils and dirt throughout the month and i was unable to get rid of it! I seriously would take pictures close up of my chin and see tiny little blackheads everywhere. (Not even visible to the eye normally) so my plan was find a cleanser or acne regimen that could clear my pores out so when my period came around, the breakouts weren't feeding off of the dirt & bacteria sitting there. I AM NOT KIDDING, I had what felt like hundreds of these tiny clogged pores and now they are almost all gone. I know and accept that, time of the month acne might be inevitable but I love that I'm able to use this mask every day. I have very very sensitive skin and this has no effect on me. No redness, no irritation and no tightness (if I apply a great moisturizer after). If you have blackheads, that you fear in time will turn to large zits or want to even help diminish the redness in some acne scars, this mask is great at doing it.