If you regularly wake with a blocked nose, start sneezing when you are in bed or experience allergy symptoms throughout the year, dust mites could be one possible trigger.

House dust mites are microscopic organisms commonly found in indoor environments, particularly in places such as bedding, mattresses, carpets and soft furnishings.

For people with a dust mite allergy, exposure can trigger an immune response that causes symptoms affecting the nose, eyes, skin or airways.

Because dust mites are present throughout the year, symptoms can be easy to mistake for a persistent cold, general sensitivity to dust or another allergy.

Understanding the typical signs and knowing how dust mite allergy can be investigated may help you identify what is actually triggering your symptoms.

Key takeaways

Dust mite allergy can cause year-round symptoms rather than seasonal flare-ups alone.
Common symptoms include sneezing, a blocked or runny nose, itchy eyes, coughing and worsening eczema or asthma symptoms.
Symptoms may be particularly noticeable at night or when spending time around bedding and soft furnishings.
Allergy blood testing can measure specific IgE antibodies to house dust mites.
A positive IgE result indicates sensitisation but should be considered alongside your symptoms.

What is a dust mite allergy?

A dust mite allergy occurs when your immune system reacts to allergens associated with house dust mites.

Dust mites themselves are extremely small and cannot usually be seen without magnification.

They live particularly well in warm indoor environments where they can be found in mattresses, bedding, carpets and upholstered furniture.

If you are allergic, exposure can trigger the production of IgE antibodies and an allergic response.

This can result in symptoms such as sneezing, nasal congestion, itchy eyes and, for some people, respiratory or skin symptoms.

What are the symptoms of a dust mite allergy?

Dust mite allergy symptoms can vary considerably between individuals.

Common symptoms can include:

Sneezing
A runny nose
A blocked or stuffy nose
Itchy or watery eyes
Coughing
Wheezing
Skin irritation
Worsening eczema
Worsening asthma symptoms

Ready Health also highlights night-time coughing, stuffiness and skin reactions as potential signs of a dust mite allergy.

The pattern of symptoms can provide useful clues about what might be triggering the reaction.

Why can symptoms be worse at night?

Your bedroom contains several places where dust mites can be present, including mattresses, pillows, duvets, carpets and other soft furnishings.

Spending several hours in bed can therefore increase the amount of time you are exposed to dust mite allergens.

This may explain why some people notice nasal congestion, coughing or other symptoms becoming more noticeable overnight or when they first wake up.

Ready Health specifically identifies worsening night-time symptoms as a classic potential sign of dust mite exposure.

However, night-time symptoms can have other causes, so the timing alone cannot confirm an allergy.

Is dust mite allergy the same as being allergic to dust?

Not necessarily.

Household dust contains a mixture of different materials.

This can include fibres, skin particles, pollen, mould spores, animal dander and dust mite allergens.

Someone who believes they are "allergic to dust" may actually be reacting to one particular allergen within their environment.

For example, Ready Health's environmental allergy panel tests separately for dust mites, cat and dog dander, mould and a range of pollens.

Identifying a specific sensitisation can provide more useful information than simply assuming household dust as a whole is responsible.

Is dust mite allergy seasonal?

Dust mite allergy can cause symptoms throughout the year.

This is different from allergies to many pollens, which tend to cause symptoms during particular seasons.

Ready Health classifies its two tested house dust mite species as year-round environmental allergens.

That does not necessarily mean symptoms will remain at the same level every day.

Changes in your environment and the amount of exposure may influence when symptoms become more noticeable.

If you experience what appears to be hay fever outside the usual pollen season, an indoor allergen such as dust mites may be one possibility worth considering.

Can dust mites trigger hay fever-like symptoms?

Yes. Dust mite allergy can cause symptoms that resemble hay fever, including sneezing, nasal congestion, a runny nose and itchy or watery eyes.

The difference is the trigger.

Hay fever usually refers to allergic rhinitis caused by pollen, while similar symptoms can also be caused by indoor allergens.

If your symptoms continue throughout the year rather than appearing primarily during spring or summer, identifying the specific allergen may help clarify what is happening.

Ready Health's environmental allergy test includes pollen, dust mites, animal dander and mould within the same environmental panel, allowing several potential triggers to be investigated from one sample.

Can dust mite allergy affect asthma?

Dust mite allergens can trigger respiratory symptoms in people who are sensitive to them.

Ready Health lists asthma among the possible reactions associated with both house dust mite species included in its environmental allergy panel.

Someone with an allergy may notice coughing, wheezing or other respiratory symptoms following exposure.

However, breathing problems should not simply be assumed to be caused by an allergy.

If you experience persistent wheezing, breathing difficulties or poorly controlled asthma symptoms, appropriate clinical assessment is important.

Severe breathing difficulty requires urgent medical attention.

Can dust mites make eczema worse?

Environmental allergens can contribute to skin symptoms in some people.

Ready Health lists eczema among the common symptoms associated with the two house dust mite allergens included in its test.

This does not mean dust mites are responsible for every eczema flare.

Eczema can have numerous triggers, and these vary between individuals.

If your skin repeatedly becomes worse in particular environments or alongside other allergy symptoms, discussing the pattern with a healthcare professional can help determine whether allergy investigation may be appropriate.

How do you know if you're allergic to dust mites?

Symptoms can suggest an allergy, but they cannot tell you with certainty which allergen is responsible.

This is particularly important because different environmental allergies can cause very similar symptoms.

Sneezing and itchy eyes, for example, could potentially be associated with dust mites, pollen or animal dander.

One way of investigating an allergy is through specific IgE blood testing.

Ready Health offers an Environmental Allergy At-Home Test Kit that measures specific IgE responses to 19 environmental allergens, including two types of house dust mite.

The test also includes 23 common food allergens, giving 42 allergen results in total.

Which dust mites does Ready Health test for?

Ready Health's environmental panel tests for two common house dust mites:

Dermatophagoides pteronyssinus
Dermatophagoides farinae

These are listed separately within the 19 environmental allergens included in the test.

The same panel also screens tree, grass and weed pollens, cat, dog and horse dander, cockroach and Cladosporium mould.

This broader approach can be useful when symptoms do not make the trigger obvious.

For example, persistent nasal symptoms could potentially be associated with dust mites, pet dander or another environmental allergen rather than the trigger you initially suspected.

How does Ready Health's environmental allergy test work?

Ready Health's Environmental Allergy At-Home Test Kit uses a small finger-prick blood sample.

The process is completed at home.

You order the kit online, collect the sample using the equipment provided and return it using the prepaid freepost envelope.

The laboratory then analyses the sample for specific IgE responses.

Ready Health states that results are emailed within seven days of the sample arriving at the laboratory.

The test is available without a GP referral or clinic appointment and is suitable for adults and children aged four and over.

It is not suitable during pregnancy or breastfeeding.

What does a positive dust mite allergy result mean?

A positive specific IgE result indicates that your immune system has produced antibodies to the allergen. This is known as sensitisation.

However, sensitisation and experiencing clinical allergy symptoms are not exactly the same thing.

Ready Health explains that a positive result does not necessarily mean you will experience symptoms every time you encounter that allergen.

Results are therefore most meaningful when considered alongside your history.

For example, a positive dust mite result may be more relevant if you also experience persistent nasal symptoms or symptoms that regularly become worse at night.

Ready Health advises discussing significant results with your GP or a qualified allergy specialist.

Is this different from a food intolerance test?

Yes.

Ready Health's environmental allergy test measures specific IgE antibodies associated with allergic reactions.

Its separate food intolerance test measures IgG4 responses to foods and is intended as a dietary guidance tool rather than an allergy diagnosis.

This distinction is important.

If you are trying to investigate dust mite allergy, Ready Health's Environmental Allergy At-Home Test Kit is the relevant option because dust mites are included in its IgE environmental panel.

The wider health tests and checks service also includes other testing options if your symptoms suggest that a different investigation may be more appropriate.

Can antihistamines affect the blood test?

Ready Health states that antihistamines do not significantly affect the IgE blood test used for its at-home allergy kit.

This differs from skin prick testing, which can be affected by antihistamine medication.

Ready Health therefore says you do not need to stop taking antihistamines before collecting your sample.

However, the company advises people taking immunosuppressant medication to speak to their GP first because results may be less reliable.

You should not stop prescribed medication unless advised to do so by an appropriate healthcare professional.

How can you reduce exposure to dust mites?

It is extremely difficult to remove dust mites completely from an indoor environment.

However, if you have a confirmed allergy, reducing exposure may form part of managing your symptoms.

Measures may focus particularly on the bedroom and other areas containing bedding, carpets and soft furnishings.

Ready Health recommends using your results to identify specific triggers and then taking targeted steps based on what you react to.

If your symptoms are persistent or significant, a clinician can also advise whether treatments or further assessment may be appropriate.

The right approach will depend on your symptoms and individual circumstances.

When should you seek medical advice?

Consider speaking to a healthcare professional if allergy symptoms are persistent, significantly affecting sleep or everyday life, or causing respiratory problems.

Medical advice is also important if you have asthma and your symptoms are becoming more difficult to control.

If you have previously experienced a severe allergic reaction or carry an adrenaline auto-injector such as an EpiPen, Ready Health advises consulting your GP before ordering its at-home allergy test.

Severe breathing difficulty or signs of a serious allergic reaction require urgent medical attention rather than at-home testing.

Final points

Dust mite allergy can be difficult to recognise because symptoms often resemble other environmental allergies or a persistent cold.

Sneezing, nasal congestion, itchy eyes, coughing, eczema and asthma symptoms can all occur, with some people noticing that their symptoms are particularly troublesome at night.

Unlike many pollen allergies, exposure to house dust mites can occur throughout the year.

Ready Health's Environmental Allergy At-Home Test Kit measures specific IgE responses to two common house dust mites alongside 17 other environmental allergens and 23 food allergens.

A positive result indicates sensitisation rather than guaranteeing that every exposure will cause symptoms. Looking at the test result alongside your symptom history can provide a more meaningful picture of whether dust mites may be contributing to your allergy symptoms.

FAQs

What are the most common dust mite allergy symptoms?

Symptoms can include sneezing, a blocked or runny nose, itchy or watery eyes, coughing and wheezing. Dust mite allergy may also be associated with worsening asthma or eczema in some people.

Why is my dust mite allergy worse at night?

Dust mites can be found in mattresses, bedding and other soft furnishings. Spending several hours in bed may therefore increase exposure to their allergens, which can make symptoms more noticeable overnight or in the morning.

Can you have a dust mite allergy all year?

Yes. Ready Health classifies house dust mites as year-round environmental allergens, unlike many pollens that are associated with particular seasons.

How can I test for a dust mite allergy?

Specific IgE blood testing can identify sensitisation to house dust mites. Ready Health's at-home environmental allergy test includes two common house dust mite species among the 19 environmental allergens it screens.

Does a positive IgE test definitely mean I have symptoms from dust mites?

Not necessarily. A positive IgE result indicates sensitisation, but Ready Health explains that this does not guarantee symptoms every time you are exposed. Results should be considered alongside your symptom history.

What allergens does Ready Health's environmental allergy test cover?

The test screens 42 allergens in total, including 19 environmental allergens and 23 food allergens. The environmental panel includes two dust mites alongside tree, grass and weed pollens, animal dander, cockroach and mould.

Dust mite allergy: Symptoms, triggers and how to know if you're allergic