Flushing or redness is a common symptom of Rosacea and there are certain triggers that can cause flaring. When you increase the blood flow to the capillaries (flushing and redness) on a regular basis, it causes them to dilate/expand. After prolonged or repeated abuse, the capillaries tend to remain in this relaxed and larger state, leading to a more sustained redness.
Here are some common Rosacea triggers:
extreme exertion/exercise (Don’t try to use this as an excuse to avoid your workout. Your fitness instructor won’t buy it. We’ve tried.)
Pay attention to what causes your skin to become red and flushed, and do your best to avoid that activity/pleasure to prevent worsening of the condition.