Q. How quickly does a rosacea flare-up occur after contact with a trigger factor?

A. Although there are currently no data on how quickly exposure to a rosacea trigger may lead to a flare-up, the timing is likely to vary depending on the individual and nature of the trigger. You might try monitoring your individual case to see how quickly you respond to specific triggers. And remember, while a wide range of factors has been identified as potential triggers, not every trigger affects every individual.