DEAR DOCTOR K: I've always had seasonal allergies. But over the past few years, I've noticed that my lips swell and my mouth gets irritated when I eat certain fruits and vegetables. Have I developed new food allergies as an adult?
DEAR READER: I suspect you've developed a type of adult-onset food allergy known as oral allergy syndrome (OAS). People with OAS suffer from hay fever and experience an itchy mouth, scratchy throat, or swelling of the lips, mouth, tongue and throat after eating certain raw fruits, vegetables or some tree nuts.