We often think of flare-ups occurring due to stress or weather, but they can also spring up in the midst of normal day-to-day activities around the home, according to Dr. Estee Williams, assistant clinical professor of dermatology at Mount Sinai Medical Center in New York City. 

“As a rule, rosacea skin is sensitive skin,” explained Dr. Williams. “Because rosacea skin is so hyper-reactive, it is tough to predict what will set it off. From the moment you wake up to the time you hit the sack, triggers abound.”