If you've been outside lately, you know pollen is everywhere this season.
From Florida to Texas to Colorado, scientists say it's worse than it's been in years.
To see the local and national allergy forecast, click here.
Trees are producing 3,000 to 6,000 pollen particles - and it only takes 10 to trigger an allergic reaction.
Doctors say spring came late in parts of the country that were covered in snow just a few weeks ago. Those places are suddenly seeing record warm temperatures and trees, flowers and grasses are now expelling pollen at the same time.
"It's wicked bad this year," said Dr. Mona Mangat, an allergy specialist in St. Petersburg, Fla., told The Washington Post.
"We're just overwhelmed with patients right now," she said. "We're double- and triple-booked with new patients, trying to work people in because we know how much people are suffering."
The Post reports that although the pollen season will likely be over in few weeks, some will continue to suffer since grass and weed allergies tend to increase during the summer.