Squid
The acne is from the progesten in the coil. The hormone can mimick the effects of androgens in the female body.
The medical profession will tell you this is impossible w/a Mirena coil, b/c the hormone should only act in the uterus.
But the uterus is supplied by the body's bloodstream, of course. So, basically, unless they've found a way to produce an artificial hormone and coral and confine it to one part of hte body, that's rubbish.
If you're sensitive to progesten, it will affect you.
That's why so many people on this thread have had adverse side effects.
I got a diaphragm.
FPC tried to put me off, told me they had to bring in a specialist to fit it.
Go then! That's not my problem or my job!
I had to wait a month to see her. And that was fine by me.
I've never been happier. NO more hormones or contraptions left in situ in my body.