The best ways to reduce allergens at home are to keep pollen outside, wash bedding weekly, control indoor humidity, use allergen-proof bedding covers, repair moisture problems and keep pets out of the bedroom.

Creating a completely allergen-free home is nearly impossible.

Pollen blows through open windows. Dust mites settle into bedding and furniture. Mold grows wherever moisture sticks around, and pet allergens have a remarkable ability to end up everywhere.

The good news is that you do not have to move across the country or turn your home into a sterile bubble. Focus on the rooms where you spend the most time and the allergens that actually trigger your symptoms.

How Do You Keep Pollen Out of Your Home?

If pollen or outdoor mold triggers your symptoms, staying inside can help, but only if you keep those allergens from following you through the door.

Keep windows closed when pollen levels are high, particularly on warm and windy days. After spending time outside, change your clothes and shower before getting into bed. Pollen can collect on your hair, skin, shoes and pets.

There is no single time of day when pollen is always highest. Levels change based on the plants in your area and the weather, so check your local forecast instead of relying only on the clock.

If you need to mow, garden or complete other outdoor work, consider wearing a well-fitting mask. When possible, ask someone without allergies to handle tasks that stir up grass, leaves or soil.

Learn more about how daily weather can affect pollen levels and allergy symptoms.

How Do You Reduce Dust Mites?

Start in the bedroom. You spend hours there every night, and mattresses, pillows and bedding can become major reservoirs for dust mites and their allergens.

Use allergen-proof covers on your mattress and pillows. Wash sheets, pillowcases and blankets every week, then dry them completely before returning them to the bed.

You do not need to turn your water heater up to a scalding temperature. Regular washing can remove mite allergens, while keeping household water at or below 120 degrees reduces the risk of burns. 

Humidity also matters. Try to keep indoor relative humidity between 30% and 50%. Dust mites and mold generally thrive in more humid environments.

A vacuum equipped with a HEPA filter can help reduce the amount of dust released back into the room. If vacuuming aggravates your symptoms, wear a mask or leave the room while someone else cleans.

Replacing bedroom carpet with wood, tile or another hard surface may help, but it is not the only option. Regularly cleaning carpet and washing area rugs can still reduce allergen buildup.

Do Air Purifiers Help With Allergies?

A portable air cleaner with a HEPA filter may reduce airborne particles such as pollen and pet dander in the room where it is running.

Choose a unit designed for the size of the room and follow the manufacturer’s replacement schedule for its filters. An air cleaner will not remove allergens already trapped in bedding, carpet or furniture, so it works best alongside regular cleaning and source control.

Your central heating and cooling system may also be able to use a higher-efficiency filter. Check the system specifications before upgrading, since a filter that is too restrictive can interfere with airflow.

Can You Live With a Pet if You Have Allergies?

For many families, finding another home for a pet is not a realistic or desirable first step.

Start by keeping pets out of the bedroom and off upholstered furniture. Have someone without allergies brush them outside, and consider using a HEPA air cleaner in the rooms where you spend the most time.

Pet hair itself is not usually the allergen. The proteins that trigger reactions are found in an animal’s skin flakes, saliva and urine. Those proteins can cling to fur, furniture, clothing and carpet.

No cat or dog breed is completely allergen-free. If symptoms remain difficult to control, an allergist can help you decide whether medication, immunotherapy or additional changes may help.

How Do You Prevent Mold at Home?

Mold is usually a moisture problem first.

You can clean visible mold, but it will probably return if you do not address the water or humidity allowing it to grow.

Repair leaking roofs, pipes and faucets. Run exhaust fans in bathrooms and kitchens, and make sure clothes dryers vent outdoors. Wet materials should be dried within 24 to 48 hours whenever possible.

Pay particular attention to bathrooms, basements, window frames and areas around plumbing. A dehumidifier can help in damp rooms, but it must also be cleaned regularly.

Large mold problems or contamination caused by flooding may require professional cleanup, especially if someone in the home has asthma or another lung condition.

Can Cockroaches and Rodents Trigger Allergies?

Proteins found in pest droppings, saliva and body parts can trigger allergies and asthma.

The best approach is to remove the food, water and shelter that pests need:

• Store food and pet food in sealed containers
• Clean crumbs and spills promptly
• Use trash cans with secure lids
• Fix leaking pipes and faucets
• Seal cracks and other entry points
• Avoid leaving pet food out overnight

If pest control is needed, start with traps or bait stations and follow every label instruction. Sprays can irritate the lungs, so keep people with allergies or asthma away during treatment and ventilation.

Consider hiring a professional for a larger infestation.

Which Allergy Prevention Steps Should You Try First?

You do not need to replace every carpet or throw away every stuffed animal overnight.

Begin with the bedroom, where you spend the most uninterrupted time. Cover the mattress and pillows, wash bedding weekly and keep pets out.

Next, check your home’s humidity and look for leaks, condensation or other signs of excess moisture. Then focus on preventing outdoor allergens from entering through windows, clothing and pets.

Most importantly, learn what actually triggers your symptoms. An allergist can help identify whether pollen, mold, dust mites, pets or another allergen is causing the problem. That can prevent you from spending time and money on changes that may not help.

Common Questions About Allergens at Home

What Indoor Humidity Is Best for Allergies?

Aim for an indoor relative humidity between 30% and 50%. Higher humidity can encourage dust mites and mold, while excessively dry air may irritate your nose and throat.

Should You Open Windows During Allergy Season?

Keep windows closed when local pollen levels are high, especially during warm or windy weather. Check the latest pollen and hourly weather forecast before airing out your home.

How Often Should You Wash Bedding for Allergies?

Wash sheets, pillowcases and blankets once a week and dry them completely. Allergen-proof mattress and pillow covers can provide another layer of protection.

When Should You See a Doctor About Allergies?

Talk with a healthcare provider if your symptoms are persistent, worsening or interfering with sleep and daily activities. Seek medical guidance if allergies trigger wheezing, difficulty breathing or other asthma symptoms.

Before opening the windows or tackling a day of yardwork, check local pollen levels and weather conditions in the WeatherBug app.