Sun exposure appears to trigger a substance in the body that may lead to the visible blood vessels that often appear with rosacea, according to research funded by the National Rosacea Society and reported at the annual meeting of the Society for Investigative Dermatology.
"Our initial study showed that sunlight may indeed have a role in causing rosacea," said Dr. Marita Kosmadaki, research fellow, Department of Dermatology, Boston University, who presented results of her research with Dr. Mina Yaar, professor of dermatology at Boston University.