Many people are there in the world who are allergic to nuts. It is the tree nut and its different variants to which the people are allergic. To know if you are allergic to the tree nut or not you must go through the blood test or skin prick test. But how will you know that you need to have the test? Well, if you have a family history of nut allergy then you must go for the test without checking for symptoms. However, in cases when there are symptoms such as swelling, rashes, throat swelling, gastrointestinal issues (abdominal pain, nausea, vomiting, diarrhoea), and more, then the nut allergy test will be prescribed.