This time of year, if you have a drippy or congested nose that sends you to an allergist, you might be in for a surprise: You might not have allergies after all.You could, of course, have a cold -- and some adults get so many they are convinced they've developed an allergy, doctors say. One hint that that might be the case, says Dr. David Shulan, a New York allergist: They often are teachers or ...

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