Food allergy

What is it?

A food allergy occurs when the immune system responds to an allergen (an ingredient that is usually harmless) in food. This triggers an immune reaction, which can range from mild to severe. The majority of food allergies in children are not severe and usually children will outgrow many allergies with time. Some allergies, particularly nut and seafood allergies are less likely to decrease with age.

What are the symptoms?

The symptoms of a food allergy almost always develop a few seconds or minutes after eating the food. Some people may develop a severe allergic reaction (anaphylaxis), which can be life threatening. The most common type of allergic reaction to food is known as an IgE-mediated food allergy. Symptoms include: * tingling or itching in the mouth * a raised, itchy red rash (urticaria) – in some cases, the skin can turn red and itchy, but without a raised rash * swelling of the face, mouth (angioedema), throat or other areas of the body * difficulty swallowing * wheezing or shortness of breath * feeling dizzy and lightheaded * feeling sick (nausea) or vomiting * abdominal pain or diarrhoea * hay fever-like symptoms, such as sneezing or itchy eyes (allergic conjunctivitis) * Anaphylaxis The symptoms of a severe allergic reaction (anaphylaxis) can be sudden and get worse very quickly. Initial symptoms of anaphylaxis are often the same as those listed above and can lead to: * increased breathing difficulties – such as wheezing and a cough * a sudden and intense feeling of anxiety and fear * a rapid heartbeat (tachycardia) * a sharp and sudden drop in your blood pressure, which can make you feel lightheaded and confused * unconsciousness Anaphylaxis is a medical emergency. Without quick treatment, it can be life threatening. If you think you or someone you know is experiencing anaphylaxis, dial 000 and ask for an ambulance as soon as possible. Non-IgE-mediated food allergy Another type of allergic reaction is a non-IgE-mediated food allergy. The symptoms of this type of allergy can take much longer to develop – sometimes up to several days. Some symptoms of a non IgE-mediated food allergy may be what you would expect to see in an allergic reaction, such as: * redness and itchiness of the skin – although not a raised, itchy red rash (urticarial) * the skin becomes itchy, red, dry and cracked (atopic eczema) Other symptoms can be much less obvious and are sometimes thought of as being caused by something other than an allergy. They include: * heartburn and indigestion caused by stomach acid leaking up out of the stomach (gastro-oesophageal reflux disease) * stools (faeces) becoming much more frequent or loose – though not necessarily diarrhoea * blood and mucus in the stools * in babies – excessive and inconsolable crying, even though the baby is well fed and doesn’t need a nappy change (colic) * constipation * redness around the anus, rectum and genitals * unusually pale skin * failure to grow at the expected rate Mixed reaction Some children can have a mixed reaction where they experience both IgE symptoms, such as swelling, and non-IgE symptoms, such as constipation. This can happen to children who have a milk allergy.

Home Remedy


  • Saline is helpful in clearing out the nasal passages and flushing out allergens. Add some salt to warm water and use to cleanse the airways.
  • Add apple cider vinegar to water and sip slowly throughout the day. This helps to alleviate the early symptoms of allergies. It is important to continue this treatment until the symptoms subside.
  • Garlic is one of the best home remedies for allergic reactions. You can consume garlic cloves with water at night. Garlic supplements are also available in many drug stores.
  • Increase your consumption of vitamin C rich foods. This helps to strengthen immunity and protects you from infections and illnesses. 2000mg of vitamin C is the recommended dosage.
  • Add a teaspoon of turmeric powder to a glass of water and consume for relief from allergy symptoms.
  • Essential oils are known to be beneficial in relieving skin allergies and hay fever. Pour a couple of drops of basil, lavender, peppermint and basil essential oils onto a handkerchief and place against your nose when you feel the onset of allergy symptoms. You can also use these oils with a diffuser.
  • Consume a mixture of lemon and grapefruit thrice daily.


  • Don’t consume anything that you think caused the allergic reaction

Things to watch out for

Antihistamine can help relieve the symptoms of a mild or moderate allergic reaction. GP should be contacted if the symptoms are severe.

Think you might have Food allergy?

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Think you have Food allergy?