An allergy is a response or hypersensitivity to a substance that would normally be harmless but it produces a reaction in your body.
What is a prick test?
A small amount of diluted allergen (suspected protein that person is allergic to) is placed on the skin and the skin is then pricked. If a small swollen lump or ‘weal’ appears, in conjunction with a detailed clinical history. This test is only performed under medical supervision.