Your immune system defends your body against invaders that it considers threats. The production of antibodies in your blood is geared towards dealing with these threats.
Your immune system views substances such as pet dander, pollen and dust as threats. These substances are technically harmless, but you can have an allergic reaction to them.
Your immune system produces antibodies since it perceives these substances as threats. You’ll experience an allergic reaction such as coughing, itchy and watery eyes, runny nose and sneezing once your immune system goes into overdrive. This is the body trying to fight off what it considers threats.
You can be born with an allergy, or it can develop as you get older. Allergic reactions vary from person to person and mainly depends on the immune system. You may experience allergic reactions throughout the year or during spring and autumn months.