Why Are My Allergies So Bad This Year?

Your allergies aren’t just “bad this year.” They’ve been getting worse for a while.

Pollen seasons are longer than they used to be. Counts are higher. More people are dealing with seasonal allergies for the first time as adults. So if it feels like symptoms hit earlier and stick around longer, you’re not the only one noticing.

Over the past 30 years, pollen seasons have stretched by about three weeks. Warmer temperatures push plants to start earlier and stay active longer. Trees pollinate sooner. Grasses hang on. Ragweed doesn’t quit when it used to. At the same time, rising CO₂ levels are driving plants to produce more pollen overall.

Inside, we break down what’s behind the shift, how your environment shapes your triggers, what most people miss, and how to support your body and ease symptoms through allergy season.

The Science Behind Worsening Allergy Seasons

Seasonal allergies now affect nearly 60 million people in the United States every year, and the numbers keep climbing. Your immune system is responding to an environment that has genuinely changed. And don't worry, you aren't getting weaker; the pollen your body reacts to is more abundant than ever!

A landmark study on North American pollen trends found that pollen seasons have lengthened by roughly 20 days since 1990, with total airborne pollen production up about 21%. For allergy sufferers, that means more cumulative exposure, more histamine flooding your system, and more severe symptoms over a longer stretch of the year. The pollen season that used to be a predictable six-week window is now a three- to four-month gauntlet in many regions. So yeah, your tissue and eye drops budget is completely justified.

CO2 is a major driver. Higher atmospheric carbon dioxide acts like a fertilizer, causing ragweed, birch trees, and grasses to produce significantly more allergenic material. Drier springs and summers mean less rain to damp down airborne pollen, keeping pollen counts elevated for longer periods. Meanwhile, warmer winters lead to earlier tree pollen release in late spring, and delayed first frost extends ragweed well into fall.

There's also a priming effect. Your immune system becomes more sensitized to allergens over repeated exposures. If your allergies were mild five years ago and now feel severe, cumulative sensitization is part of the story. The longer you are exposed to these allergy triggers, the sharper your allergic responses become.

Regional Allergy Seasons Across the Country

Peak allergy seasons vary by region, and knowing your local pollen calendar changes how you prepare. For many allergy sufferers, "allergy season" isn't one fixed window. It's nearly year-round.

The Northeast sees tree pollen starting in March and peaking through May, grass pollen from June through August, and ragweed dominating September through October. That's essentially March through October of overlapping spring and fall allergies.

In the Southeast, allergy seasons start even earlier, often in February for tree pollen. Warm, humid conditions extend grass pollen seasons and fuel mold growth, which acts as both an indoor and outdoor allergen. Seasonal allergies in the Southeast can blur straight through summer.

Ragweed is especially dominant in the Midwest, with some of the highest pollen counts in the country from August through October.

In the Southwest, juniper and cedar pollen can start as early as January, and wind-driven pollen travels far in the dry climate.

The West Coast features diverse tree species with overlapping pollen seasons from February through September.

If your allergies feel year-round, they might actually be. Overlapping pollen seasons, indoor allergens like dust mites and mold spores, and rising pollen levels mean the gaps between traditional allergy seasons keep shrinking. Tracking local pollen counts with a weather app or allergy forecast tool gives you better day-to-day information than any general calendar.

Why Your Allergies Get Worse at Night

Nighttime allergy symptoms often feel more intense, and it has more to do with your environment than your immune system.

Pollen levels peak in the early morning (5–10 AM) and again in the evening. If you're outside during those windows, pollen collects on your hair, skin, and clothing. Without rinsing it off before bed, it transfers to your pillow and sheets, creating hours of close exposure while you sleep.

Indoor allergens add another layer. Dust mites live in mattresses, pillows, and upholstered furniture, making your bed their ideal habitat. Without protective encasements, you’re essentially sleeping in a concentrated source of allergens. If pets share your bed, dander builds on top of that.

Your body position also plays a role. When you lie down, mucus doesn’t drain as easily. It settles in the nasal passages, which can make congestion and pressure feel more noticeable.

Here are a few straightforward ways to reduce nighttime exposure:

• Shower before bed to rinse off pollen
• Run a HEPA filter in the bedroom
• Use air conditioning instead of opening windows on high-pollen days
• Cover your mattress and pillows with allergen-proof encasements
• Keep pets out of the sleeping area (we know, that one’s tough)

Small changes here can make a noticeable difference in how your body handles nighttime exposure, helping you get more consistent rest.

Hidden Allergy Triggers You're Probably Missing

Pollen gets the spotlight during allergy season, but indoor allergens and environmental triggers contribute to allergy symptoms year-round in ways that mimic seasonal allergies. Knowing what you're actually reacting to helps you pick the right remedy.

Mold spores peak in fall when leaves decay and thrive in damp spaces like bathrooms, basements, and HVAC systems. Mold growth indoors can trigger the same sneezing, nasal congestion, and watery eyes as outdoor pollen. People who notice symptoms worsening in the fall, even after ragweed season ends, are often reacting to mold rather than other allergens.

Pet dander is sticky and persistent. It clings to surfaces and stays airborne long after a pet has left the room. Even homes without current pets can have residual dander. If you visit someone with a cat and experience a runny nose or itchy eyes within an hour, dander is likely the culprit. Air pollution amplifies allergic reactions, too. Research shows that diesel exhaust particles make pollen more allergenic and increase the permeability of nasal passages to common allergens. People in high-traffic areas experience more severe symptoms at the same pollen counts as those in rural settings.

If you've recently moved to a new region, your body may be encountering tree pollen and grass pollen species it hasn't seen before. Your immune system treats unfamiliar pollen as a new threat, which can cause stronger allergic responses.

This is why allergies sometimes feel suddenly worse after relocating, even for people who never had them before. Welcome to your new zip code. Your sinuses definitely noticed.

Allergy Symptom Remedies That Actually Work

When it comes to managing allergies, the most effective approach starts with awareness and consistency. For many allergy sufferers, reducing exposure to common allergens like pollen, pet dander, dust mites, and mold spores can significantly improve symptoms. Tracking pollen counts during peak allergy seasons, using air filters or a HEPA filter, and limiting time outdoors when pollen levels are high are simple ways to support your system before symptoms escalate.

From there, herbal support offers a powerful, plant-based way to work with your body’s natural immune response:

• Stinging Nettle (Urtica dioica) is one of the most trusted herbs for seasonal allergies, traditionally used to support a healthy histamine response and help ease symptoms like sneezing, itchy eyes, and a runny nose. Nettle can be brewed into a tea and enjoyed throughout allergy season, often paired with local honey for additional support.
• WishGarden’s Kick-Ass Allergy combines nettle with complementary herbs to support multiple pathways involved in allergic responses. This fast-acting liquid formula is a go-to when symptoms are already present, helping you stay clear and comfortable without the fog or jitters that can come with some options.
• Over-the-counter antihistamines, nasal sprays, and allergy eye drops can help manage nasal congestion, watery eyes, and other allergy symptoms. Oral antihistamines and nasal steroid sprays are commonly used during allergy season, though some people may experience side effects depending on the formula.

If you’re dealing with severe allergies, more severe symptoms, or year-round allergies that don’t improve with exposure reduction, herbal support, or allergy medication, it may be time to connect with a healthcare provider or allergist. They can help identify specific allergy triggers and explore advanced options like allergy shots to better support your long-term health.

Rebecca Younger is passionate about herbs and women's health. She aspires to plant seeds of inspiration within her community about plant medicine and healthier ways of life. She studied Herbal Medicine at Herbalism Roots in Denver and is a certified Doula through the Matrona Foundation. She is the Brand Communications Specialist at WishGarden Herbs.

For educational purposes only. This information has not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease, or to sell any product.