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Cracked lips

Your lips can say a lot about your health. Severely cracked, dry lips may be a reaction to medication, an occupational hazard (if you're a brass musician), or a symptom of allergy, infection, or other conditions. Cracking at the corners of the mouth may be a symptom of Sjögren’s (pronounced SHOW-grens) syndrome, an immune system disorder. Sjögren’s causes dry eyes and dry mouth, as well as joint pain and dry skin. As many as 4 million Americans—mostly women—have this condition.

Next: A foul mouth