Your doctor or allergy specialist will ask you about your previous reactions to peanuts or peanut products, such as how long it took to develop symptoms after eating peanuts, and whether any of your family members have allergies or conditions like asthma. Next, the allergy specialist will do a skin test to see if you have an allergic reaction. During a skin test, a tiny bit of your skin will be pricked and a small amount of peanut liquid will be placed on your skin. If you develop a skin rash or red bumps in that area of your skin, it is likely you are allergic to peanuts.
You may also need to have a blood test that will show whether your body has made proteins called antibodies that would cause an allergic reaction when you eat peanuts. One such test is called an ELISA test, and another is called a RAST test.
