Seasonal Allergies Make Your Immune System Fight Harmless Pollen Like a Parasite
Your immune system treats harmless pollen like a dangerous parasite, causing it to release chemicals called histamines. These chemicals create allergy symptoms like runny nose, itchy watery eyes, and sneezing during spring, summer, and fall when plants pollinate.
Seasonal allergies happen when your body's defense system makes a mistake. Your immune system is designed to fight off real threats like viruses and bacteria. But with allergies, it treats harmless pollen from trees, grasses, and weeds like dangerous invaders.
When pollen enters your body, your immune system panics and releases chemicals to fight it off. The main chemical is called histamine, along with others called leukotrienes and prostaglandins. These chemicals cause the cluster of symptoms you know well: runny nose, itchy and watery eyes, sneezing, and coughing.
The timing matters too. Different plants release pollen at different times of year. Tree pollen usually hits in spring, grass pollen peaks in summer, and ragweed pollen dominates fall. Mold spores can also trigger the same reaction year-round in damp areas.
Your genetics play a big role in whether you develop allergies. If your parents have them, you're more likely to have them too. But even people without family history can develop seasonal allergies as adults.
About 50 million Americans deal with seasonal allergies every year. Understanding why your body reacts this way helps you recognize symptoms early and find better treatments to feel normal during allergy season.
Spring allergy season typically peaks in April and May as tree pollen counts rise across most of the United States.
Was this article helpful?
0 people found this helpful