Tree pollen is the worst spring allergen almost everywhere.

Yes, that’s the short answer—but which tree depends on your region. Oak, birch, maple, and cedar dominate different parts of the country. Check your local pollen forecast (weather apps or sites like Pollen.com) to know exactly what’s in the air near you.

Management is straightforward: start taking a non-drowsy antihistamine (loratadine, cetirizine) before symptoms hit, usually mid-February or early March. Add a nasal steroid spray like fluticasone if you’re stuffed up. Shower and change clothes after being outside—pollen clings to everything. Keep windows closed and run an air purifier in your bedroom.

The biggest mistake people make is waiting until they feel terrible. Spring allergies are predictable—treat them proactively.

Don’t guess your enemy. Check your local pollen report and adjust your meds accordingly.