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Rosacea is a skin condition that causes facial redness, particularly on the nose, chin, cheeks and forehead. The redness may eventually become brighter, and small blood vessels may start to appear. Rosacea can also develop on the chest, ears, neck and scalp, in addition to making the eyes bloodshot or watery. Hard, red bumps and pus-filled pimples can develop if rosacea is left untreated.
Although anyone can develop rosacea, it generally affects middle-aged women who have light skin. There are several theories for the cause of rosacea, including a generalized disorder of the blood vessels, microscopic skin mites, psychological factors, fungus or a connective tissue disorder.
There are a variety of known triggers for rosacea, including sun and wind exposure, emotional stress, temperature extremes, vigorous exercise, alcohol consumption, hot baths, hot and spicy foods, and use of anti-inflammatory medicines and drugs that dilate blood vessels.