More than 20% of the population have food-related symptoms, but only a minority have an "authentic" food allergy.
Food allergy is mostly suspected by extra-digestive signs that appear in the skin by redness around the mouth, or swelling of the lips. This allergic reaction sometimes takes on a much greater magnitude with generalized reactions that can lead to anaphylactic shock, sometimes fatal.
More rarely seen by patients or doctors, food allergy can cause disorders of the digestive system (esophagus, stomach, intestines).
Details of these allergic reactions:
- symptoms around the mouth: itching and edema of the lips, tongue, palate, throat, ears.
- general symptoms: malaise, angioedema (deep swelling, such as angioedema) and anaphylactic shock that can be fatal, if there is no adequate treatment.
- Respiratory: rhinitis, rhino-conjunctivitis, asthma.
- cutaneous: hives, eczema, itching of the palms of the hands and scalp.
- digestive: nausea, vomiting, diarrhea, abdominal pain.
When do symptoms appear?
The time of onset of the symptoms of the allergic reaction varies: from a few seconds sometimes, a few minutes most often to two or three hours.
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