The Rosacea Blog Answering your questions about Rosacea What Causes Rosacea? What causes Rosacea? The practical answer to this question is that Rosacea results from a combination of genetic and environmental factors. read more Search for: Recent Posts What Causes Rosacea? Categories Video Archives November 2015 About Dr. Jay Dr. Jay is a Board Certified Dermatologist who is on the Teaching Staff of New York-Presbyterian Hospital and Weill-Cornell Medical School.