While sun exposure is one of the most common trigger factors for flare-ups, finding a sunscreen that does not irritate the face can be a challenge for many rosacea sufferers.

"Individuals with rosacea are often uniquely sensitive to topical preparations applied to the face," said Dr. Mark Lebwohl, chairman of Dermatology, Mount Sinai School of Medicine, at the recent annual meeting of the American Academy of Dermatology. "For this reason, attention to ingredients can help patients find products that work best for them."

The sun can be warm and invigorating, but for many rosacea sufferers, it's a reason to take special precautions. In fact, sun exposure was ranked as the leading rosacea trigger by 61 percent of rosacea patients in a National Rosacea Society survey.