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A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of exposure.
A food intolerance differs from a food allergy or chemical sensitivity because it generally requires a normal serving size to produce symptoms similar to an IgE immunologic response. While food intolerances may be mistaken for a food allergy, they are thought to originate in the gastrointestinal system.
Signs and symptoms. Food intolerance is more chronic, less acute, less obvious in its presentation, and often more difficult to diagnose than a food allergy. Symptoms of food intolerance vary greatly, and can be mistaken for the symptoms of a food allergy.
Is it a food allergy, sensitivity or intolerance? Here's how to tell, according to experts. Skip to main content. Lifestyle. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
Because histamine intolerance symptoms can mimic those seen in other conditions such as food allergies or intolerance to sulfites and biogenic amines such as tyramine, there is often confusion in differentiating the causal agent responsible for adverse reactions.
Signs and symptoms. In the severe form, symptoms include abdominal pain, profuse vomiting, lethargy, potentially diarrhea, and even shock. [2] [3] [4] Additional symptoms could potentially include – but are not limited to – headache, pallor, lethargy, constipation, and abdominal swelling ( distension ).
Red, itchy, or watery eyes are often par for the course when it comes to seasonal allergies.But they can also be a telltale sign of pink eye (a.k.a., conjunctivitis).
CSID symptoms are frequent, daily events; they are lifelong, and they are postprandial (occurring after eating food). These symptoms can range from mild to severe and include chronic, watery, acidic diarrhea; intestinal gas and bloating; nausea; and abdominal pain.
Oral allergy syndrome (OAS) or pollen-food allergy syndrome (PFAS) is a type of allergy classified by a cluster of allergic reactions in the mouth and throat in response to eating certain (usually fresh) fruits, nuts, and vegetables.
The onset of NCGS symptoms may be delayed hours to a few days after gluten ingestion, whereas in celiac disease it can take days to weeks. Wheat allergy has a fast onset (from minutes to hours) after the consumption of food containing wheat and can lead to anaphylaxis.