Suffer from seasonal allergies? Depending on where you live, you may already be sneezing, sniffling and rubbing your itchy eyes.

And you may be in for a whopper of a spring — especially since spring is arriving earlier in several regions.

The first pollen culprit each year is typically trees. If rainfall was good the year before, resulting in solid tree growth, that typically means healthy trees. Combine that with relatively warm forecasts with no more freezing temperatures on the horizon and it's a perfect storm of pollen-filled trees.

Right now, that means the spring pollen allergy season has already kicked in for most of the U.S. A high pollen count is likely to continue for much of spring , according to AccuWeather.

According to the American Academy of Allergy, Asthma and Immunology, people in the West Coast are getting the brunt of pollen compared to people in the Southeast. Pollen season is also lasting almost a month longer than in previous years.

"Some research has suggested that the warming trend that we have in our environment is causing the pollen seasons to start a little bit earlier, and extend a little bit longer," Dr. Stanley Fineman told NBC News. "Consequently, patients are suffering because they're exposed to pollen, for longer periods of time."

However the Mid-Atlantic region will get a reprieve. Accuweather Senior Meteorologist Alan Reppert said continuous rainfall and temperatures will delay the start of pollen season in those states.

To check the pollen counts so far in your area, check out the National Allergy Bureau reports.

It's only getting worse

This year, there are trees pollinating simultaneously — causing what one allergist labeled an "allergy explosion," and we can thank climate change.

“Climate change, globalization, air pollution, and over-sanitization of the environment in the early years of life are just a few of the causes that, taken together, have introduced new allergens into our environment causing needless suffering," Dr. Clifford Bassett told NBC News.

Trees like oak and maple are producing more pollen at the same time with other trees like ash and poplar — causing the allergy explosion. You can see for yourself in the video above.

Pollen starting earlier and earlier

juniper tree Juniper trees are often some of the first to spread their pollen each year. (Photo: Nataliia Politova/Shutterstock)

The spring allergy season has been starting earlier for years now, Bassett told Weather.com in 2016.

"In general over the last 10 years or more, we’ve seen an earlier start to the spring allergy season by about two weeks," Bassett said. "Each year is different. You’re mostly seeing a longer season spring through fall because of warmer temperatures."

Bassett also suggested that climate change plays a part.

"[Climate change] is causing more carbon dioxide in our environment, which in turn tells a lot of plants to produce more pollen, and the pollen itself is more supercharged and more powerful."

Of course tree pollen isn't the only thing allergy sufferers have to worry about. Just when you're starting to get relief from the trees, that's typically when the grasses start releasing their pollen.

Better stock up on the tissues and antihistamines.

Editor's note: This file was originally published in March 2016 and has been updated.

Mary Jo DiLonardo writes about everything from health to parenting — and anything that helps explain why her dog does what he does.