Screening for allergies is important in determining the cause of your troubling symptoms, and also in identifying the specific allergens that trigger your reactions. Identifying the specific cause of your symptoms lets you avoid these triggers as much as possible to reduce the frequency of symptoms. There are several different tests available to identify an allergen. Blood tests are among the most common and screen the blood for any type of allergy indicators. Skin tests are also used to see if a specific allergen will trigger reactions on the skin.
You may need to stop taking antihistamines or other medications before undergoing these tests, so speak to your primary physician in order to achieve the most effective results.