bonjours,
Long term lurker here and this is my first post ever. Miss Jane touched a nerve here with her cystic acne, stress and rosacea. I have been there ! During warm summers, I had to take 3 months of antibiotics to keep it under control. However, very silly, after fainting with an anaphylactic shock, I eventually figured out that I am sensitive to high histamine levels. We all need histamine to function, but when I eat foods which are high in histamine (like tomatoes, red food in general, shellfish/shrimps, aged cheese, wine, liquorice, spices, pickled things, in short, everything tasty), my rosacea gets triggered and goes into full blown over drive. if I push it further, I get very interesting and very large hives all over.
When I did a short elimination diet, the itching on my face stopped (bliss!) , the acne went away and my skin went quiet. My stomach also stopped acting up. If I sin too much and eat unhealthy (for me), I pay the price with a big flare-up. Stress makes it worse. This is just my experience, but I spoke to people who had the same problem and also managed to reduce the problem by eliminating food products from their diet. I am going back to lurking now..