There are few things more frustrating than going to bed with clear skin and waking up with a mammoth zit on your face.
The redness may show up as flushing that lasts a little longer each time. Without treatment for rosacea, this redness can become permanent. Another cause of permanent redness is visible blood vessels on the face.
Red acne scars can make your skin look unhealthy and inflamed, long after your acne has disappeared.