Signs of a food allergy

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Food allergies are common in infants and children, but can occur at any age. Therefore, it is necessary to know the signs of a food allergic reaction to quickly intervene, avoiding unfortunate consequences.

1. What is a food allergy?

A food allergy is an immune system reaction that occurs soon after eating a certain food. Even a small amount of a food can cause an allergic reaction. In some people, a food allergy can cause severe symptoms or even a life-threatening reaction called anaphylaxis. Food allergy symptoms usually develop within minutes to two hours after eating the offending food.

2. What are the signs of a food allergy?

The most common signs of a food allergy include:
Itching or itching in the mouth Rash Swelling of the lips, face, tongue and throat or other parts of the body Wheezing, stuffy nose or trouble breathing Abdominal pain, diarrhea diarrhea, nausea, or vomiting Dizziness or fainting Anaphylaxis: In some people, a food allergy can trigger a serious allergic reaction called anaphylaxis. This can cause life-threatening signs, including constriction of the airways, a swollen throat or a feeling of tightness in the throat that makes it difficult to breathe, a severe drop in blood pressure, a rapid pulse, dizziness or lose consciousness

3. Causes of food allergies

With a food allergy, the immune system mistakenly identifies a particular food or substance in the food as harmful. As a result, the immune system triggers cells to release an antibody called immunoglobulin E (IgE) to neutralize the food or allergen. Next time you eat a small amount of that food, the IgE antibody will recognize it and signal the immune system to release a chemical mediator called histamine, as well as other chemicals, which in turn causes allergy symptoms.
In adults, most food allergies are triggered by certain proteins in shellfish, such as shrimp, lobster and crab, peanuts, and tree nuts, such as walnuts and pecans. ..In children, food allergies are often triggered by proteins in peanuts, eggs, cow's milk, wheat,..

4. How to prevent food allergy?

The best way to prevent an allergic reaction is to know and avoid the foods that cause the symptoms. Read food labels carefully. If you have had a severe allergic reaction, wear a medical alert bracelet or necklace to let others know that you have a food allergy in case communication is not possible. Consult your doctor about prescribing emergency epinephrine. Plan meals and snacks before you leave the house. If necessary, bring hypoallergenic foods when traveling or to events. If your child has a food allergy, take these precautions to keep them safe. Inform key people that your child has a food allergy. Talk to school staff, parents of your child's friends, and other adults who regularly interact with your child. At Vinmec International General Hospital, there is a package of examination and advice on treatment of atopic dermatitis to help customers assess their general condition and advise on measures to prevent recurrence.
When registering for a package of examination and consultation for treatment of atopic dermatitis, customers will receive: Dermatology specialist examination. Perform tests such as: quantitative IgE, fresh mycobacteria, specific IgE quantification with respiratory allergens - food (Panel 1 Viet), test Rida Allergy Screen (panel 1)...

Please dial HOTLINE for more information or register for an appointment HERE. Download MyVinmec app to make appointments faster and to manage your bookings easily.

Reference source: Acaai.org; Mayoclinic.org