Since there was no known cause of rosacea, I needed to learn about common triggers. "We do not know exactly what causes it, but the most popular triggers are stress, alcohol, extreme temperatures and some spices," says Dr. Day. summer Triggered, she said, you'll quickly understand – as in, in the day. By observing my skin better, I realized that heat, exercise, and dairy products caused my skin to push. I've also removed all the peels and hard scrubs from my bathroom cabinets and stocked with oil cleansers, redness-reducing mists and masks that are suitable for sensitive skin. As for imperfections, I use a localized treatment so that it focuses only on imperfections and does not irritate the rest of my face.