What is the definition of rosacea?

Rosacea is a common, chronic skin condition that causes redness, bumps, and sometimes visible blood vessels on the face. It typically affects the cheeks, nose, forehead, and chin, but can also appear on the neck, chest, and back. Rosacea is not contagious and does not cause permanent damage to the skin, but it can be a challenging condition to manage. The severity and symptoms of rosacea can vary from person to person, and there is no cure, but it can be effectively managed with the proper treatment.