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Allergies occur when our body overreacts to a 'trigger' or allergen. Common allergies include hay fever, asthma, hives and food allergy.

It is important to identify any foods or food chemicals that may trigger your asthma, but this must be done under strict medical supervision.

Peanuts, tree nuts and seeds can all cause allergies with symptoms ranging from milder reactions to a severe allergic reaction (anaphylaxis).

Allergy occurs when the body overreacts to a 'trigger' that is harmless to most people.

Pollen allergies cause seasonal hay fever and asthma and can be treated with antihistamines, nasal sprays or asthma medication

Allergies to insect stings and bites range from milder allergic reactions to life-threatening, severe allergic reactions (anaphylaxis).

Symptoms of fish and shellfish allergies vary and range from milder reactions to a life-threatening severe allergic reaction (anaphylaxis).

Food allergy is an immune response, while food intolerance is a chemical reaction.

All medication has the potential to cause allergies but some people can have allergic reactions to specific prescription or over-the-counter medications.

Symptoms of lactose intolerance include bloating, gas, abdominal pain and diarrhoea.