Food Allergy Symptoms and Causes

Food Allergy symptoms

When the body immune system reacts to certain foods, it causes food allergy. The signs and symptoms of such a reaction can be digestive issues, hives or swollen airways. It affects an approximated 6 to 8 percent of children under the age of 3 and up to 3 percent of adults.

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The most common food allergy signs and symptoms include

  • Mouth itching
  • Eczema
  • Nausea or vomiting
  • Swollen lips, face, tongue and throat etc.
  • Dizziness
  • Nasal congestion and trouble in breathing


The immune system of people having food allergy mistakenly identifies a specific food as something harmful to their body. To counter this harmful effect, the immune system triggers cells to release an antibody known as immunoglobulin E (IgE). This is done to neutralize the allergy-causing food also known as the allergen. Various allergens can cause food allergy in adults, these include

  • Shellfish, such as shrimp, lobster and crab
  • Peanuts
  • Tree nuts, such as walnuts and pecans
  • Fish

The allergens that may cause food allergy in children are

  • Peanuts
  • Tree nuts
  • Eggs
  • Cow’s milk
  • Wheat
  • Soy

Other than the allergens, having a family history of asthma is a risk factor in getting food allergy. People with food allergy symptoms should not delay its treatment to avoid complicacies.

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