Diagnosis of food allergy

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Food allergy affects nearly every one in life. Food allergy is basically an abnormal response to food which can be triggered as a result of specific reaction in the immune system and often they are expressed by characteristic allergy symptoms. Other kinds of reactions to foods, not included in food allergies may be food poisoning, lactose or milk intolerance and toxic reactions. Food allergy symptoms resemble those of food intolerance.

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Food allergy mechanism involves heredity and immune system.Nausea, diarrhea, vomiting, abdominal pain, itching in mouth and difficulty in swallowing are some symptoms of food allergy. For diagnosis of food allergy, a doctor first needs to know if a person has allergy to specific foods. This can be done by taking medical history, dietary diary and elimination diet. If this procedure suggests a specific food allergy the doctor then recommend tests such as blood tests, skin tests and a good challenge which confirm a food allergy.

Almost every sort of allergy is diagnosed by taking the history of the patient. In each case the doctors try to supplement the history with proper diagnostic testing. This means what sort of food items the patient ate, what changes the patient experienced in the environment.

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