You should test for SIBO if you have Rosacea

The link between rosacea and small intestinal bacterial overgrowth (SIBO) is not new but has been largely ignored by dermatologists. Until recently the publications of scientific studies of the link has been limited. However, A recent study presented at the American College of Gastroenterology Annual Scientific Meeting and reported in the Journal of the American Academy of Dermatology indicates confirms that there is a link. Furthermore, the articles states that 46% of prospective patients with rosacea had SIBO, and these patients were prescribed rifaximin, an antibiotic commonly used for traveler’s diarrhea. After rifaximin, 78% of those patients saw an improvement in their rosacea. For a hard to treat disease that is a remarkable improvement.

Ref: Yahoo Health
https://www.yahoo.com/health/how-your-gut-health-is-linked-to-rosacea-125348935683.html