PORTLAND, Ore. — Oregon’s cold winter meant trees hung on to their pollen longer than during the last few winters.

But now, in late March, that is changing.

“By this weekend, if Saturday and Sunday looks to be nicer and warmer and sunnier and drier, that’s when the pollen levels will really increase,” said Dr. Barzin Khalili with the Allergy Clinic in downtown Portland.

He said the main culprits are Hazelnut, Birch and Alder trees, which use the wind to spread their pollen.

Some people are already noticing the impact.

“This eye is swelling up. It’s sore, it’s swollen, it’s heavy. It feels like I have one eye asleep and that is allergies,” said Roya Amirsoleymani on the street outside Dr. Khalili’s office.

Even those who are not feeling the impact yet, know they are likely on the way.

“My face swells up a lot and it looks like I’ve been crying for hours and hours. My eyes turn bright red — its awful,” said Kai Scott-Moncrieff.

He summed up the feelings of many. “It sucks!” I wish pollen wasn’t a thing but it’s just…reality,” he said.

Here are some tips from Dr. Khalili to help you through the spring allergy season.

First, don’t mistake a cold for an allergic reaction.

“The colds tend to last 7 to 10 days, they tend to be self-limited. But if you start seeing there’s a correlation with the onset of a pollen and symptoms lasting weeks to month or two then you know we’re…