Why do I need an allergy blood test?
Your allergist will recommend that you have an allergy blood test to measure the amount of IgE (allergy) antibodies in your blood. When your body reacts to substances that you might be allergic to, such as specific foods or chemicals, IgE antibodies are produced, so this acts as a marker against your potential allergy.
To find out what is causing an allergic reaction, your blood can be taken to the laboratory and tested against common allergens. The severity of your allergic response is usually due to a combination of the extent of your exposure to allergens and genetic background.
What does the test involve?
A blood sample will be taken, usually from your arm. More than one sample may need to be taken, depending on the number of tests being performed. The process is quick and only mildly uncomfortable.
After your test results come back (usually 48 hours), your allergist will be in touch to go through them with you and establish whether you need a follow-up consultation.