Rosacea is a common skin disease that causes redness and swelling on the face. Often referred to as adult acne. Rosacea may begin as a tendency to flush or blush easily and progress to persistant redness in the center of the face and gradually involve the cheeks, forehead, chin, and nose. It can involve the ears, chest, and back. As the disease progresses, small blood vessels and tiny pimples begin to appear on and around the reddened area. The condition rarely reverses itself and may last for years. It can become worse without treatment.