Understanding What Causes Year-Round Allergies

If you find yourself sneezing, rubbing your eyes, or waking up with a stuffed nose every single morning, no matter the time of year, pollen is probably not the problem. Most people think of allergies as a spring thing: trees blooming, grass growing, and a box of tissues on every table. But for millions of people, the sneezing never stops when the flowers stop blooming. In fact, around 40% of allergic rhinitis cases are perennial, meaning symptoms show up year-round, and another 40% of cases carry features of both seasonal and perennial rhinitis. The good news is that once you know what is triggering your allergies, you can finally get effective, long-lasting relief. 

Read on to learn about the most common causes of year-round allergies, what you can do to help reduce symptoms, and where to find the best allergy specialist in Los Angeles for personalized treatment.

Year-Round Allergies: Symptoms and Common Causes

Most people think of allergies as a spring thing: trees blooming, grass growing, and a box of tissues on every table. But there is a more persistent type called perennial allergic rhinitis, and it doesn’t follow the seasons. Instead of the typical pollen allergy, perennial allergic rhinitis is usually caused by things in your home. The tricky part is that the symptoms of both types of allergies look the same: a runny nose, itchy eyes, sneezing, and that foggy, worn-down feeling that makes you wonder if you are coming down with a cold. The difference is that a cold clears up in a week or two, and annual rhinitis improves with the seasons, but year-round allergy symptoms stick around for months or never leave at all. 

The most common causes of year-round allergy symptoms include: 

1. Dust Mites 

You cannot see them, but they are almost certainly in your bed right now. Dust mites are microscopic creatures that live in fabrics like your mattress, pillows, couch cushions, and curtains. Dust mite allergies are the most common cause of year-round allergic asthma. What actually triggers the allergic reaction is not the mites themselves but their waste and the debris left behind when they die. Your immune system reads those tiny particles as a threat and fires off a response, including sneezing, nasal congestion, and itchy eyes. 

Dust mites thrive in warm, humid environments and live in fabric items like bedding, upholstered furniture, curtains, and carpets. Because people spend roughly a third of their lives in bed, the bedroom is often where symptoms are worst. Washing bedding in hot water every week, keeping indoor humidity below 50%, and using allergen-proof covers on your mattress and pillows are among the most effective ways to reduce your exposure.

2. Pet Dander

Plenty of pet owners spend years sniffling, sneezing, and rubbing their eyes without ever suspecting the animal curled up next to them. It is a hard thing to consider, especially when your dog or cat feels like part of the family. Pet allergies can be a problem all year round because the substances that trigger them are not limited to any particular season. 

Most people assume the allergy is to pet fur, but fur itself is not the real problem. The actual trigger is a protein found in pet saliva, urine, and dead skin flakes, called dander. The proteins in pet dander are sticky, so it clings to furniture, floats through the air, and can stay in a home for months even after a pet is no longer there. This is why people sometimes move into a new apartment and start sneezing within days, or why visiting a pet-owning friend leaves them congested for hours. 

If over-the-counter medications are not providing enough relief and giving up your pet is not something you want to do, seeing the best allergy doctor in Los Angeles for custom allergy shots can help desensitize you to your specific animal allergen over time. Keeping pets out of the bedroom, using a HEPA air purifier, and washing your hands after contact can also make a meaningful difference in day-to-day symptoms.

3. Indoor Mold

Mold gets dismissed as a problem for old buildings or flooded basements, but it grows in far more ordinary places than most people realize. A slow drip under the kitchen sink, condensation around a bathroom window, or a damp corner behind the washing machine can all produce enough moisture to let mold take hold. 

When mold releases spores into the air, breathing them in can trigger the same sneezing, congestion, and itchy eyes that dust mites and pet dander cause, but because mold is often out of sight, people rarely connect their symptoms to it. If your allergies seem worse in certain rooms, especially bathrooms, basements, or kitchens, mold could be the reason. 

Keeping indoor humidity levels below 50%, running exhaust fans during and after showers, fixing any leaks quickly, and checking hidden areas like under sinks and behind appliances can all help reduce your exposure to mold spores before they become a bigger problem.

Effective Treatments for Year-Round Allergies: Allergy Shots and Immunotherapy

If you have been dealing with year-round allergy symptoms and over-the-counter allergy medication is not cutting it anymore, immunotherapy may be the best long-term treatment option. Unlike antihistamines or nasal sprays that manage symptoms day by day, immunotherapy works by changing how your immune system responds to an allergen in the first place. The goal of allergen-specific immunotherapy is to make the immune system less sensitive to the allergen by allowing it to gradually get used to it, reducing symptoms in the medium to long term. There are two main ways to do this: 

Allergy Shots

Allergy shots are the oldest and most widely used form of treatment. Allergy shots work by giving you an injection of the allergen, with each dose slightly higher than the last, training your immune system to become more tolerant over time. Allergy shots are designed to work against environmental allergens, including dust mites, pet dander, mold, and cockroaches, but they are not effective against food allergies.

Sublingual Immunotherapy 

Sublingual immunotherapy treatment works by placing small amounts of the allergen under the tongue and can help address a variety of airborne allergens, including pet dander, tree and grass pollen, and molds. Allergen-specific immunotherapy can prevent the original allergy from developing into allergies to other substances or from progressing into asthma, which is a significant advantage that no daily medication can offer. 

Finding the Best Allergy Specialist in Los Angeles for Effective Allergy Relief 

Year-round allergies are exhausting, but a persistent stuffy nose and itchy eyes are not something you have to learn to live with. Dust mites, pet dander, indoor mold, and other year-round triggers are identifiable, testable, and treatable. The right diagnosis changes everything, and that starts with seeing someone who knows how to look for the right things.

With conveniently located offices in Santa Monica and Torrance, Dr. Daneshrad works with patients across Los Angeles who have been struggling with allergy symptoms and are now ready for lasting relief. We begin with precise diagnostic testing to pinpoint your specific triggers, and then we build a treatment plan around those results. We also offer both allergy shots and sublingual immunotherapy drops as treatment options designed to address the root cause rather than mask what you are feeling with allergy medications.