Wish doctors were honest about how Kyleena (and hormonal IUDs in general) cause acne breakouts in women. I asked doctors and they repeatedly assured me that since hormonal IUDs use a localized progestin, the hormone doesn't enter into the bloodstream and cause acne. But this is not true. I had never struggled with acne prior to my Kyleena insertion. I've now had my IUD for over 3 years, and ever since I have persistent hormonal acne on my chin. It's still a good birth control product, but please keep in mind that acne is a common side effect of the hormonal IUD, affecting between 14-30% of people who have one.