Please note: Rosacea 101 is a comprehensive, 373 page book, covering the conventional and alternative treatments for rosacea and covers basic rosacea 101 knowledge for rosacea newbies. It is a must have book for those who need in one book what they need to know about rosacea. The list below is on page 46 of this book. All the triggers below have references which show the sources considered in making this list and these sources are in my book. However, just about all the trigger factors in this list are purely anecdotal reports from rosacea sufferers. Only one trigger factor has ever been considered studied in a clinical paper and that is coffee. Obviously trigger factors need to be clinically studied to evaluate if they are actually a real trigger for rosacea.