Do you experience allergic reactions? You're not alone; there are millions of people in the US who suffer from allergies. An allergy occurs when your body reacts to something in your food, environment, weather, and other places. However, the symptoms vary among individuals and can manifest as a cough, blocked airways, or rashes on the skin, eyes, or ears. Allergy testing is necessary for many people since they are a constant struggle to manage and can interfere with your normal life activities.