Rosacea is a chronic, inflammatory skin condition which principally affects the face.
There are four components to rosacea: flushing/persistent redness, blood vessels, pimples, and thickened skin tissue.
Rosacea usually develops over a long period of time. It often begins as a tendency to flush and blush easily, then progresses to persistent redness of the cheeks, forehead, chin, and nose, or sensitivity to cosmetics. It can produce small, red papules (bumps) or pus-filled papules (pustules).