what is rosacea caused by
Rosacea is not caused by alcohol abuse, as people thought in the past. But in people who have rosacea, drinking alcohol may cause symptoms to get worse (flare). Rosacea often flares when something causes the blood vessels in the face to expand, which causes redness. Things that cause a flare-up are called triggers.osacea-Topic Overview. Rosacea (say roh-ZAY-shuh) is a very common skin disease that affects people over the age of 30. It causes redness on your nose, cheeks, chin, and forehead.