Most sources regarding rosacea state that blushing/flushing are symptoms of rosacea. However, they are not clear on what exactly distinguishes normal physiological blushing/flushing from rosacea blushing/flushing. For example, don't most people blush/flush to a certain degree after eating spicy food or after strenuous exercise? How long does typical rosacea blushing/flushing last? What is rosacea blushing/flushing supposed to look like?