Rosacea is a skin condition that affects more than 14 million Americans. If you think you might be one of them, here's what you need to know. What is rosacea? Rosacea is a skin condition that most often affects the face. The main symptoms are redness, flushing, and bumps or pimples. Rosacea can also cause swelling and burning sensations in the eyes. Some people with rosacea also have dry skin, itching, and a general feeling of being unwell.