Red, irritated skin can be a mystery. Is it rosacea? Eczema? Are you simply a delicate flower? (Nothing wrong with that, unless you’ve ambushed your face with seven different exfoliating products.) To understand the difference between common redness-related skin conditions, we went to Elizabeth K. Hale, M.D., a leading expert in the field of dermatology who sees patients with red, irritated skin every day.