Key Message: Some people may have food allergies to certain foods, and food allergies can range from mild to severe and can be fatal. If you experience food allergy symptoms after eating, seek medical attention immediately. Check food labels for allergen information to avoid eating foods that contain allergens.

What is food allergy?

Food allergy is a reaction of the body's immune system to some substances in food. A very low level of an allergenic substance may cause an allergic reaction in susceptible populations. A local survey revealed that about 1 out of 20 children in Hong Kong was reported to have food allergies.

Common allergens are:

Common allergens

Symptoms of food allergy include swollen face, tongue or lips, shortness of breath and itchy skin. Anaphylactic shock, an acute, severe and potentially life-threatening allergic reaction may develop in severe cases.

Seek medical advice at once if the following symptoms develop after meal:

Seek medical advice at once if the following symptoms develop after meal

How to avoid food with allergens?