According to AAFA researchers, climate change is likely contributing to worsening allergy seasons, particularly in warmer states. Rising temperatures have led to longer growing seasons, which in turn have led to increased pollen production.

Between 1990 and 2018, plant growing season in the United States increased by an average of 20 days, leading to 21% more pollen production. In addition, a recent report from  Climate Central found that some cities are now experiencing as many as 50 to 99 extra days of allergy season.

As allergy season intensifies, almost 26 million Americans with asthma may be at risk since the condition is triggered by allergies in 60% to 80% of patients.

"We are experiencing longer and more intense allergy seasons because of climate change. For people with asthma, allergies can trigger an asthma attack," said Kenneth Mendez, CEO and president of AAFA. "If we don't take immediate action on the climate crisis, pollen production will only intensify."

"As pollen counts spike, we often see spikes in emergency room visits for asthma," Mendez said. "Around 3,600 people per year die from asthma, so it is important to address and manage asthma and allergy triggers where you live."

How to combat allergies this spring

With allergy season now starting earlier and lasting longer, here are six  tips  that can help you manage your allergies this spring:

1. Check pollen counts

The  American Academy of Allergy, Asthma, and Immunology (AAAAI) recommends limiting outdoor activities on days with high pollen counts, as well as keeping your windows closed. AAAAI's National Allergy Bureau provides up-to-date pollen counts.

2. Go outside on rainy days

Moisture helps clear pollen out of the air, while dry, windy days are more likely to have lots of pollen.

3. Use high-efficiency filters

Using filters can help keep the air inside cleaner, as filters trap pollen and other allergens that can come in through forced air-conditioning or heating systems.

4. Dry laundry indoors

Pollen can cling to clothes, sheets, and towels, so make sure you dry your laundry inside.

5. Treat your symptoms early

Most allergy medications work best if you take them before pollen hits the air, and some allergists recommend treatment around two weeks before symptoms typically surface. Talk to your doctor about when you should start treatment.

6. Shower after being outside

After you come inside, it's a good idea to change your clothes and rinse the pollen off your skin and hair. (Tucker, The Hill, 4/16; Asthma and Allergy Foundation of America, "2023 Allergy Capitals," accessed 4/21)