North American pollen seasons are 20 days longer than in 1990 due to climate change, impacting 26% of adults and up to 19% of children with seasonal allergies. Symptoms include itchy eyes, runny nose, and sneezing. Treatment involves over-the-counter medications like antihistamines and nasal sprays, used proactively. Lifestyle changes like keeping windows closed and showering after being outdoors can reduce exposure. For persistent symptoms, allergy immunotherapy may be necessary.

Prepared by Olivia Bennett and reviewed by editorial team.