Fall is often celebrated as the most picturesque season of the year. The weather cools, the leaves turn brilliant shades of red and gold, and cozy fashion makes a comeback. Apple picking, pumpkin spice, and crisp mornings—what’s not to love?

Unfortunately, for many people, fall also marks the return of seasonal allergies. If you’ve found yourself dealing with itchy eyes, sneezing, and sinus pressure, you’re not alone. And if you suffer from dry eye syndrome, you might find that your symptoms become even worse this time of year.

So, what exactly causes fall allergies—and why do they make dry eyes even more uncomfortable? Let’s break it down.

 

What Are Fall Allergies?

Fall allergies typically begin in late summer and extend through September and October, although symptoms may last even longer in some areas. If you’ve noticed allergy symptoms returning as soon as the air turns cool, there’s a good chance you’re reacting to some of fall’s most common environmental triggers.

Common Fall Allergy Triggers:

1. Ragweed Pollen

Ragweed is by far the most notorious fall allergen. Just one ragweed plant can release over a billion grains of pollen, and it can travel for miles through the air. Even if you don’t live near a ragweed patch, you can still be affected by its pollen.

• Peak season: August through October

• Symptoms: Sneezing, nasal congestion, itchy throat, and red, itchy eyes

2. Mold Spores

As leaves fall and pile up, they begin to decay—especially in damp, rainy conditions. This creates a perfect environment for mold growth, and mold spores can easily become airborne.

• Found in: Leaf piles, compost, soil, and damp basements

• Symptoms: Sinus pressure, eye irritation, respiratory congestion

3. Dust Mites

After a long summer with the windows open, the first use of your home heating system in the fall can stir up accumulated dust and release dust mites into the air.

• Common in: HVAC vents, bedding, and upholstery

• Symptoms: Runny nose, sneezing, itchy or burning eyes

 

How Fall Allergies Worsen Dry Eye Syndrome

If you already suffer from dry eyes, fall allergies can be especially aggravating. Here’s why:

Allergens Enter the Eyes

Airborne allergens don’t just enter your body through the nose and mouth—they also enter through the eyes. In a healthy eye, the tear film helps flush away irritants. But for those with dry eye syndrome, this process is impaired.

Poor Tear Production = Less Protection

Dry eye syndrome occurs when the eyes don’t produce enough tears, or when the quality of the tears is poor. Both of these issues limit your eye’s natural ability to wash away allergens, dust, and debris.

• Fewer tears mean allergens stay on the eye’s surface longer.

• Lower-quality tears evaporate quickly, leaving the eye exposed.

The result? Inflamed, red, itchy, and puffy eyes that feel even worse during allergy season.

 

The Role of Meibomian Gland Dysfunction (MGD)

One of the most common causes of poor-quality tear production is meibomian gland dysfunction (MGD).

What are the Meibomian Glands?

These tiny oil-producing glands are located along the edges of your upper and lower eyelids. Their job is to secrete oil (meibum) that mixes with your tears to create a stable film over the eye. This oil layer prevents the tears from evaporating too quickly.

What Happens with MGD?

In MGD:

• The glands become clogged or inflamed.

• Oil secretion is reduced or altered.

• The tear film becomes unstable and evaporates prematurely.

Without this crucial oil layer, your eyes become dry, irritated, and unable to flush out allergens properly—exacerbating both dry eye and allergy symptoms.

 

The Result: A Vicious Cycle of Discomfort

Fall allergens irritate the eyes and trigger inflammation. In people with healthy tear production, the eyes can flush out many of these particles. But for those with dry eyes, the reduced tear film allows allergens to linger longer, increasing symptoms like:

• Itching

• Burning

• Redness

• Light sensitivity

• A gritty or foreign body sensation

Unfortunately, this cycle can repeat daily throughout the fall season, especially if you’re exposed to pollen, mold, or dust regularly.