Updated 6 hours ago NBCUniversal Media, LLC The watery, itchy, burning eyes, runny nose, constant sneezing. Allergy symptoms are no fun. Allergies make us uncomfortable, irriated and downright miserable. If you have an allergy, your immune system overreacts to a substance you inhaled, touched or ate, according to the American Academy of Allergy, Asthma and Immunology. Download our mobile app for iOS or Android to get alerts for local breaking news and weather. So, we wanted to know everything we could about allergies: What's the best way to fight them? Why do we get them? How do we differentiate allergy symptoms from COVID-19 symptoms?