How is it done?
There are two main types of allergy tests:
A small sample of blood will be taken from a vein in your child's arm. The sample can then be tested in a laboratory for allergy or asthma triggers such as food (milk, eggs, soya, nuts, wheat or fish) or pollen, mould and pet fur. The level of IgE (immunoglobulin E), a chemical naturally released during an allergic reaction, will also be measured.
The results should tell you what your child is allergic to. Results can take a few weeks.
Skin prick test
A tiny amount of allergen (the substance you think is causing the allergy) is put onto the skin to see if there is a reaction. Several allergens can be tested at the same time. You'll get the results within 30 minutes.
For more information on what happens during an appointment to discuss allergies see Preparing to see your GP.