Dust Mite Allergy

If you have allergies or asthma, a tiny creature living in your home could be making big problems for you. Although you can’t see them, you may be having an allergic reaction to them. They are dust mites and they live in many homes throughout the world.

Dust mites may be the most common trigger of year-round allergies and asthma. They are on every continent except Antarctica. It may not be possible to rid your home entirely of these creatures. But there are ways in which you can lessen your allergic reactions to them.

What Is a Dust Mite?

A dust mite measures only about one-quarter to one-third of a millimeter. They are too small to see with your eyes alone. Under a microscope, they look like white bugs. They have eight legs, so they are not insects, but arthropods, like spiders.

Dust mites thrive in temperatures of 68 to 77 degrees Fahrenheit (20 to 25 degrees Celsius). They also like humidity levels of 70 to 80 percent. There are at least 13 species of mites. They are all well adapted to the environment inside your home. They feed mainly on the tiny flakes of human skin that people shed each day. These flakes work their way deep into the inner layers of furniture, carpets, bedding and even stuffed toys. These are the places where mites thrive. An average adult person may shed up to 1.5 grams of skin in a day. This is enough to feed one million dust mites!

What Is a Dust Mite Allergy?

An allergen is a substance that causes an allergic reaction. Both the body parts and the waste of dust mites are allergens for many people. Most dust mites die in low humidity levels or extreme temperatures. But they leave their dead bodies and waste behind. These can continue to cause allergic reactions. In a warm, humid house, dust mites can survive all year.

What Are the Symptoms of Dust Mite Allergy?

Common dust mite allergy symptoms include:  

  • Sneezing
  • Runny nose
  • Itchy, red or watery eyes
  • Stuffy nose
  • Itchy nose, mouth or throat
  • Postnasal drip (a flow of mucus from behind your nose into your throat)
  • Cough

If your dust mite allergy triggers your asthma, you may also experience:

  • Difficulty breathing
  • Chest tightness or pain
  • A whistling or wheezing sound when breathing out
  • Trouble sleeping caused by shortness of breath, coughing or wheezing

How Does a Doctor Diagnose Dust Mite Allergy?

To diagnose a dust mite allergy, your doctor may give you a physical exam and discuss your symptoms. If your doctor thinks you have a dust mite allergy, they may suggest a skin or blood test. If you have symptoms year round, you could have a dust mite allergy.

Skin Prick Test (SPT)
In prick/scratch testing, a small drop of the possible allergen is placed on your skin. Then the nurse or doctor will lightly prick or scratch the spot with a needle through the drop. If you are allergic to the substance, you will develop redness, swelling and itching at the test site within 20 minutes. You may also see a wheal. A wheal is a raised, round area that looks like a hive. Usually, the larger the wheal, the more likely you are to be allergic to the allergen.

A positive SPT to a particular allergen does not necessarily mean you have an allergy. Health care providers must compare the skin test results with the time and place of your symptoms to see if they match.

Specific IgE Blood Test
Blood tests are helpful when people have a skin condition or are taking medicines that interfere with skin testing. They may also be used in children who may not tolerate skin testing. Your doctor will take a blood sample and send it to a laboratory. The lab adds the allergen to your blood sample. Then they measure the amount of antibodies your blood produces to attack the allergens. This test is called Specific IgE (sIgE) Blood Testing. (This was previously and commonly referred to as RAST or ImmunoCAP testing.) As with skin testing, a positive blood test to an allergen does not necessarily mean that an allergen caused your symptoms.

What Is the Treatment for Dust Mite Allergy?

The most important step is to avoid dust mites as much as possible. Limiting your exposure to dust mites will reduce your symptoms. However, it’s nearly impossible to completely get rid of dust mites in your environment. You may also need medicines to control symptoms.

Certain over-the-counter and prescription medicines may help reduce dust mite allergy symptoms.

  • Antihistamines are available as pills, liquids or nose sprays. They can relieve sneezing and itching in the nose and eyes. They also reduce a runny nose and, to a lesser extent, nasal stuffiness.
  • Nasal corticosteroids are a type of nose spray. They reduce swelling in your nose and block allergic reactions. They are the most effective medicine type for allergic rhinitis because they can reduce all symptoms, including nasal congestion. Nasal corticosteroids have few side effects.
  • Leukotriene receptor antagonists block the action of important chemical messengers (other than histamine) involved in allergic reactions.
  • Cromolyn sodium is a nose spray that blocks the release of chemicals that cause allergy symptoms, including histamine and leukotrienes. This medicine has few side effects, but you must take it four times a day.
  • Decongestants are available as pills, liquids, nose sprays or drops. They help shrink the lining of the nasal passages and relieve stuffiness. Use decongestant nose drops and sprays only for a short time. Oral decongestants can cause side effects such as sleeplessness and increased blood pressure in some people. Consider checking with your doctor before using them.

Many people with a dust mite allergy do not get complete relief from medicines. This means they may consider immunotherapy (allergy shots). Immunotherapy is a long-term treatment that can help prevent or reduce the severity of allergic reactions. It can reduce the course of allergic disease by changing your body’s immune response to allergens.

Allergy Shots - Subcutaneous Immunotherapy (SCIT) is an effective treatment that has been around for more than 100 years. SCIT is a series of shots that have progressively larger amounts of allergen. An injection of the allergen goes into the fat under your skin about once a week during the initial phase of treatment. Many patients get complete relief of their allergies after being on SCIP for one to three years. Many physicians will continue SCIT for a period of five or more years. SCIT can provide long-lasting symptom relief. Many people experience benefits for at least several years after the shots stop.

How Can I Prevent Allergic Reactions to Dust Mites?

Remember, having dust mites doesn’t mean your house isn’t clean. In most areas of the world, these creatures live in every home, no matter how clean. But, you can reduce their effects. There are many changes you can make to your home to reduce the numbers of these unwanted “guests.”

Studies show that more dust mites live in your bedroom than anywhere else in your home. So this is the best place to start.

  • Cover mattresses and pillows in zippered dust-proof covers. These covers are made of a material with pores too small to let dust mites and their waste product through. They are also called allergen-impermeable. Plastic or vinyl covers are the least expensive, but some people find them uncomfortable. You can buy other fabric allergen-impermeable covers from many regular bedding stores.
  • Wash your sheets and blankets weekly in hot water. You have to wash them in water that’s at least 130 degrees Fahrenheit or more to kill dust mites.
  • Get rid of all types of fabric that mites love and that you cannot easily wash regularly in hot water. Avoid wall-to-wall carpeting, curtains, blinds, upholstered furniture and down-filled covers and pillows in the bedroom. Put roll-type shades on your windows instead of curtains.
  • Have someone without a dust mite allergy clean your bedroom. If this is not possible, wear a filtering mask when dusting or vacuuming. Many drug stores carry these items. Dusting and vacuuming stir up dust. So try to do these chores when you can stay out of the bedroom for a while afterward.
  • Special HEPA filter vacuum cleaners can help to keep mites and mite waste from getting back into the air. You can buy these filters from an allergy supply company or in some specialty vacuum stores if your vacuum cleaner doesn’t come with a HEPA filter.
  • Vacuuming is not enough to remove all dust mites and their waste. A large amount of the dust mite population may remain because they live deep inside the stuffing of sofas, chairs, mattresses, pillows and carpeting.

Treat other rooms in your house like your bedroom. Here are more tips:

  • Avoid wall-to-wall carpeting, if possible. If you do use carpeting, mites don’t like the type with a short, tight pile as much. Use washable throw rugs over regularly damp-mopped wood, linoleum or tiled floors.
  • Wash rugs in hot water whenever possible. Cold water isn’t as effective. Dry cleaning kills all dust mites and is also good for removing dust mites from living in fabrics.
  • Keep the humidity in your home less than 50 percent. Use a dehumidifier and/or air conditioner to do this.
  • Use a HEPA filter with your central furnace and air conditioning unit. This can help trap dust mites from your entire home. Freestanding air cleaners only filter air in a limited area. Avoid devices that treat air with heat, electrostatic ions or ozone.


Medical Review October 2015.

Asthma and Allergy Materials for Patients and Caregivers | AAFA | Programs for Patients and Caregivers


Asthma and Allergy Educational Materials and Tools for Patients and Caregivers

AAFA offers many educational materials and tools for patients of all ages. Many are available in Spanish. Also, if you or your child has food allergies, visit Kids With Food Allergies (KFA). KFA is AAFA’s food allergy division. It has extra resources, like allergy-friendly recipes and webinars.


Where Can I Find Free Materials and Tools to Download?

Asthma Action Plan Download PDF

Everyone with asthma should have a written Asthma Action Plan. This plan has information and instructions on how to manage your asthma. It has sections for information about medicines, how to know when your symptoms get worse and what to do in an emergency. If you do not have an Asthma Action Plan, download and print this form. Take it to your doctor and have them fill it out for you. Asthma Action Plans also tell school staff and other caregivers about your child’s asthma. You can give it to teachers, school nurses and after-school care staff.

Student Asthma Action Card Download PDFasthma action card      
The Student Asthma Action Card is great tool to give to your child’s school about asthma management. It has sections for asthma triggers, daily medicines and emergency directions.

Child Care Asthma/Allergy Action Card Download PDF 
action cardThis card has information you need to care for your young child with asthma or allergies. The card has sections for information about a medication plan and a list of your child’s signs and symptoms. It also has steps on how to handle asthma and allergy emergencies.

Anaphylaxis Emergency Action Plan Download PDF

Everyone with a life-threatening allergy should know what to do during an allergic reaction. You should have a written Anaphylaxis Emergency Action Plan. It tells you and others what to do if you have allergic symptoms or a severe allergic reaction (anaphylaxis). If you do not have a written Anaphylaxis Emergency Action Plan, download and print this form. Take it to your doctor and have them fill it out for you. Anaphylaxis Action Plans also tell school staff and other caregivers about your child’s severe allergies. You can give your plan to school nurses, teachers and after-school care staff.


QuickAsthma Cards       
QuickAsthma Cards offer a fast way for you to learn life-saving information. You can put your own information on these cards. You can carry them in your purse, briefcase or backpack. Give copies to caregivers, teachers and family members.
QuickAsthma Spacers Card Download PDF
QuickAsthma Peak Flow Card Download PDF

QuickAsthma Inhalers Card Download PDF
QuickAsthma Nebulizers Card Download PDF

quickasthmaQuickReport Cards 
QuickReport Cards help you make environments better for those with asthma or allergies. These cards are great for parents, school staff, management and workers.
QuickReport Card – Home Download PDF
QuickReport Card – Workplace Download PDF

Asthma-Friendly Home – A Checklist for Families

This asthma trigger checklist is easy for families to use. It helps you find and control your child’s asthma triggers at home. It has simple ideas to help you get rid of or reduce your child’s asthma triggers.

Asthma-Friendly Home - A Checklist for Families –English  Download PDF
Asthma-Friendly Home - A Checklist for Families –Spanish  Download PDF

Asthma-Friendly Child Care – A Checklist for Child Care Providers
This asthma trigger checklist is easy for child care providers to use. It helps them find and control asthma triggers in their child care center. It can help staff keep their place healthy for the children they serve. Parents can also use this checklist when looking for child care.

Asthma-Friendly Child Care - A Checklist for Providers –English  Download PDF
Asthma-Friendly Child Care - A Checklist for Providers –Spanish  Download PDF

Ally & Andy’s Awesome Asthma and Allergy Activity Booklet  Download PDF  
Ally & Andy’s Awesome Asthma and Allergy Activity Booklet (Arabic)   Download PDF coloring and activity book gives children and families a basic understanding of asthma and food allergies. It is a fun way for children to learn how to know common asthma triggers. It also helps them learn how to manage their asthma and food allergies. It has word finds, crossword puzzles, word scrambles, mazes and other activities. It also has a story to read and color and a list of websites on asthma and allergies for parents and kids.

Books and Other Materials Available to Purchase


Asthma Basics for Children – A Parent Handbook

This handbook helps parents of young children (newborn through age 6) learn to manage their child’s asthma. It covers important asthma management topics. It also has six activities parents or caregivers can use to help children learn more about asthma.

$12 each (English #H-014PE, Spanish #H-014PS)

youcanYou Can Control Asthma

The You Can Control Asthma education program gives children ages 6 to 12 and families more self-confidence and knowledge and skills needed to control asthma. These books teach asthma management through pictures, captions and activities. The book for kids is at a third-grade reading level. They help them make choices and feel in control of their asthma. The book for families is at a fifth-grade reading level. It helps you help your child manage their asthma.

Family Book: $5.50 (English #B-001E, Spanish #B-001S)
Kids’ Book: $5.50 English #B-002E, (Spanish #B-002S – Temporarily out of stock)
$10 Set of Books (English #B-003E, Spanish – Temporarily out of stock) 

Living with Asthma and Allergies Brochure Series  Living with Asthma and Allergies

This brochure series has common asthma and allergy topics. They are easy to understand with helpful pictures. They are great if you just found out you have asthma or allergies, or even if you’ve had them for a long time. They are also good for caregivers.
Single copies: $1.50 (See order number below.)

  • Brochure 1: Allergy Basics – Temporarily out of stock
  • Brochure 2: Seasonal Allergies (#P-002E)
  • Brochure 3: Asthma Basics – Temporarily out of stock 
  • Brochure 4: Unproven Methods – Temporarily out of stock
  • Brochure 5: Exercise and Asthma (#P-005E)
  • Brochure 6: Household Allergies (#P-006E)

Spanish BrochuresAsthma Brochures in Spanish    
We offer brochures in Spanish. They have basic information about managing asthma, written in easy-to-understand terms.

Single copies: $1.50 (See order number below.)

  • Brochure 1: ¿Que Es Asma? (What is Asthma?) (#P-013S)
  • Brochure 2: Lo que Usted Necesita Saber Sobre las Medicinas para el Asma (What You Need to Know about Medicines for Asthma) (#P-014S)
  • Brochure 3: Plan para el Control de los Activadores del Asma (Asthma Trigger Control Plan) (#P-015S)
  • Brochure 4: Medidores de Potencia Respiratoria (Peak Flow Meters) (#P-016S)

For more information or to place an order for materials, please contact AAFA at:

PHONE: 1-800-727-8462 1-800-727-8462 Monday - Friday between 10 AM and 3 PM EST

Or print out this PDF order form Download PDF and email, mail or fax to AAFA at:

Asthma and Allergy Foundation of America
8201 Corporate Drive
Suite 1000
Landover, MD 20785
FAX: 202.466.8940