Dust mite allergies

At a glance

  • Dust mite allergies cause symptoms such as sneezing and a runny nose.
  • Making certain changes in the home can help.
  • Tablets and nasal sprays relieve the symptoms.
  • Immunotherapy (desensitization) can provide long-term relief.


Photo of a man doing laundry

In dust mite allergies, the symptoms aren’t caused by the dust itself. Instead, the is triggered by certain substances that are mainly found in the droppings of dust mites. The tiny dropping particles stick to dust and spread in that way.

No home is completely free of dust mites. They are found in beds, carpets, rugs, soft furniture and curtains. Because of this, people who have a dust mite have symptoms such as sneezing and a runny nose all year round. If someone has an allergic reaction that affects their upper airways (nose, sinuses and throat), it is called “allergic rhinitis."


People who have a dust mite sneeze a lot, and have a runny or stuffy nose. If their symptoms are more severe, they might also feel weak and tired. Their eyes might water and itch, and they might have swollen eyelids. Asthma-like symptoms such as coughing, wheezing and shortness of breath may occur too.

Dust mite allergies usually cause milder symptoms than hay fever (a pollen ) does. But they occur all year round, whereas hay fever is seasonal. The symptoms are typically worse at night and in the morning because dust mites tend to live in mattresses, pillows and bedding.

Causes and risk factors

Allergy symptoms develop when your body overreacts to particular substances that are usually harmless. These substances (allergens) trigger a chain reaction in the immune system. First, the body makes antibodies to fight the allergen, and the antibodies bind to specific cells. If these cells come into contact with the allergen again, they are then able to “respond” by releasing chemical substances such as histamine. These substances then set off an allergic reaction, causing symptoms such as sneezing or itchy eyes.

It is almost impossible to avoid contact with dust. If dust is stirred up – for instance, by a draft of wind or when shaking up bedding – it floats through the air and is breathed in, together with the allergens on it.

Sometimes a higher risk of allergies runs in families. Environmental factors such as air pollution and cigarette smoke can make allergies more likely too.

Prevalence and outlook

Allergic rhinitis affects about 1 out of 4 people in industrialized countries like Germany. Most people develop the symptoms before the age of 20.

Dust mite allergies typically first develop in childhood or puberty, and never go away again. If people have allergic rhinitis for many years, the might “move down” into the lower airways (lungs) too, causing asthma.

Sometimes people become allergic to certain foods too after a while (a phenomenon known as cross-reactivity). This is less likely to happen with dust mite allergies than it is with other allergies, like hay fever. But people who have dust mite allergies may become allergic to foods like shellfish and mollusks such as mussels, crabs, lobsters, shrimps or snails.

Severe symptoms may increase the risk of developing other medical conditions such as sinusitis ( of the sinuses). Allergic rhinitis often makes the mucous membranes that line the airways overly sensitive in general too. As a result, the nose may react more strongly to irritants like dry air in heated rooms and cigarette smoke.


If you see a doctor, he or she will first ask you about your symptoms, circumstances in life, and medical history. The doctor can then do an allergy test (a skin prick test) to find out whether you're allergic to particular substances. This involves placing small drops of various allergens on the skin of your forearm, leaving enough space between them, and then gently pricking the surface of your skin where the allergens are, so the substances go into the skin. If the skin becomes red and swollen (like a big mosquito bite) where it was pricked, it’s a sign that you’re allergic to that substance.

You might also need a blood test or something known as a provocation test. This is where the membranes lining the nose are exposed to extracts of the potential allergen using a nasal spray or drops. If the lining of your nose becomes swollen, you sneeze and your nose starts running, you are likely to be allergic to that substance.


The most effective way to prevent symptoms is to avoid the substances that trigger the . Although dust mites can’t be completely avoided, contact with them can be reduced. Particularly in the bedroom, it may be helpful to combine a number of different approaches: wiping the bedroom floor with a damp cloth, using a mite-proof mattress cover (“encasing”), removing dust traps such as soft furniture and curtains, and regularly washing your bedding at temperatures above 60°C (140°F).

Dust mites survive longer in warm and humid conditions. So it can be a good idea to keep the bedroom temperature constant between about 18 and 20°C (about 64 to 68°F), and regularly open the windows to let fresh air in. Air humidifiers and plants can make it easier for dust mites to thrive, so it’s best to keep them out of bedrooms.

Dust mite sprays containing acaricides (pesticides against mites and ticks) could also help reduce the symptoms. They can be sprayed onto mattress covers, for instance. Special dust mite air filters are available too, but it isn’t clear how effective they are.


Various medications are available for the treatment of symptoms:

  • Antihistamines
  • Steroids (corticosteroids)
  • Chromones (mast cell stabilizers)
  • Leukotriene receptor antagonists
  • Decongestant nasal drops and sprays

There are also non-drug alternatives such as saline (salt water) nasal sprays and nasal washes (nasal irrigation).

Allergen-specific immunotherapy (also known as desensitization) can reduce your sensitivity to allergens over the long term. A bit like with vaccines, this treatment approach involves exposing people to small amounts of the allergen. Here it is done at regular intervals by either injecting the allergen under your skin or placing it under your tongue. Allergen-specific immunotherapy takes at least three to five years.

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IQWiG health information is written with the aim of helping people understand the advantages and disadvantages of the main treatment options and health care services.

Because IQWiG is a German institute, some of the information provided here is specific to the German health care system. The suitability of any of the described options in an individual case can be determined by talking to a doctor. informedhealth.org can provide support for talks with doctors and other medical professionals, but cannot replace them. We do not offer individual consultations.

Our information is based on the results of good-quality studies. It is written by a team of health care professionals, scientists and editors, and reviewed by external experts. You can find a detailed description of how our health information is produced and updated in our methods.

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Updated on August 17, 2023

Next planned update: 2026


Institute for Quality and Efficiency in Health Care (IQWiG, Germany)

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