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Patent Granted Rosacea /roʊˈzeɪʃiə/ is a chronic condition characterized by facial erythema (redness)[2] and sometimes pimples.[3] Rosacea affects all ages and has four subtypes, three affecting the skin and the fourth affecting the eyes (ocular type). Left untreated it worsens over time. Treatment in the form of topical steroids can aggravate the condition.