Dust Mite Allergy
Symptoms, Diagnosis and Treatment for House Dust Mite Allergy in London
House dust mite allergy is a common cause of year-round allergy symptoms, particularly nasal congestion, sneezing, itchy eyes, cough and worsening asthma. Unlike seasonal pollen allergy, dust mite allergy often causes symptoms throughout the year because exposure happens indoors on a daily basis.
At the London Allergy and Immunology Centre, we provide specialist assessment, allergy testing and personalised treatment for children and adults with suspected dust mite allergy, including advice on environmental control, medication optimisation and selected allergy immunotherapy pathways.
Specialist assessment and treatment for dust mite allergy, allergic rhinitis and allergy-related asthma at the London Allergy and Immunology Centre.
What is Dust Mite Allergy?
House dust mites are microscopic organisms that live in household dust, especially in bedding, mattresses, pillows, carpets and soft furnishings. It is not the mite itself that usually causes allergy symptoms, but proteins found in mite particles and waste that become airborne and are inhaled.
Microscopic house dust mite — a key indoor allergen responsible for persistent symptoms such as nasal congestion, sneezing, itchy eyes and allergy-related asthma.
Dust mite allergy is an IgE-mediated allergic condition. In sensitised individuals, the immune system reacts to dust mite allergens and triggers inflammation in the nose, eyes, lungs and sometimes the skin. This can contribute to allergic rhinitis, allergic asthma and occasionally eczema flare-ups.
Common Symptoms of House Dust Mite Allergy
✔ Nasal blockage or congestion
✔ Frequent sneezing
✔ Runny or itchy nose
✔ Itchy, red or watery eyes
✔ Cough, chest tightness or wheeze
✔ Symptoms that are worse in bed, after housework or in dusty rooms
✔ Year-round allergy symptoms rather than just seasonal symptoms
Many patients notice worsening symptoms after changing bedding, vacuuming, sleeping in older or damp homes, or spending time in heavily carpeted environments. Dust mite allergy is also an important trigger in some people with asthma.
Dust Mite Allergy and Asthma
House dust mite allergy is particularly relevant in patients with persistent allergic rhinitis and allergic asthma. EAACI guidance supports house dust mite allergen immunotherapy as an add-on option for selected patients with house dust mite-driven allergic asthma, alongside usual inhaled asthma treatment.
Recent reviews continue to support a role for sublingual immunotherapy (SLIT) in reducing symptoms and exacerbations in selected patients with dust mite-driven respiratory allergy, while newer real-world and clinical trial data suggest ongoing interest in SLIT treatment.
How is Dust Mite Allergy Diagnosed?
Diagnosis starts with a careful allergy history and review of symptom pattern, triggers and any associated asthma or eczema. At our clinic, diagnosis may include:
Clinical Assessment
Detailed review of nasal, eye, chest and skin symptoms, symptom timing, home environment, family history and response to previous treatment.
Allergy Testing
Skin prick testing and/or specific IgE blood testing to confirm sensitisation to house dust mite and distinguish it from pollen, pet or mould allergy.
Respiratory Assessment
Spirometry and FeNO may be helpful in selected patients with asthma symptoms or suspected allergic airway inflammation.
Accurate diagnosis is important because symptoms of dust mite allergy can overlap with non-allergic rhinitis, viral illness, mould exposure or pet allergy.
Treatment for Dust Mite Allergy
Treatment depends on the severity of symptoms, age of the patient, the presence of asthma, and whether symptoms remain uncontrolled despite usual medication.
Medication
Treatment may include non-sedating antihistamines, nasal sprays, eye drops and asthma treatment where needed. Environmental control alone is often not enough for significant symptoms.
Environmental Measures
We provide practical advice on bedding, bedroom ventilation, reducing indoor damp, cleaning routines and dust reduction strategies to help reduce allergen load.
Allergy Immunotherapy
For selected patients with persistent symptoms, house dust mite allergen immunotherapy may be considered. Current evidence supports SLIT in selected respiratory allergy patients, and in 2025 NICE recommended an innovative dust mite treatment for severe symptoms not controlled by standard care.
What is Dust Mite Immunotherapy?
Dust mite allergen immunotherapy works by exposing the immune system to a controlled dose of allergen over time, with the aim of reducing allergic sensitivity. This may be given as sublingual immunotherapy (SLIT).
NICE announced in 2025 that a house dust mite treatment had been recommended for people with severe symptoms, and NHS hospital guidance describes a three-year course designed to reduce allergic symptoms by building tolerance.
✔ May reduce nasal and eye symptoms
✔ May improve control in selected dust mite-driven asthma
✔ May reduce medication needs in some patients
✔ Requires specialist assessment and monitoring
Dust Mite Avoidance Measures, Bedding Advice & Clinical Evidence
Reducing exposure to house dust mites can support symptom control, particularly when combined with appropriate medical treatment. Practical measures include using allergen-proof mattress and pillow encasements, washing bedding weekly at 60°C or higher, and choosing synthetic rather than feather-filled bedding. Additional steps such as reducing indoor humidity, limiting carpets and heavy furnishings, and using a HEPA-filter vacuum cleaner may help lower allergen load within the home environment.
However, it is important to recognise that clinical trials and systematic reviews have shown that environmental control measures alone are often insufficient to produce significant improvements in allergy or asthma symptoms. As a result, current guidelines emphasise that avoidance strategies should be viewed as supportive measures, rather than a replacement for evidence-based treatments such as intranasal sprays, antihistamine tablets and allergen immunotherapy in selected patients.
Environmental exposure to dust mites is also influenced by geography. House dust mites thrive in warm, humid environments and are significantly less prevalent at high altitudes, where lower humidity and cooler temperatures limit their survival. Studies have shown that individuals with dust mite allergy may experience symptom improvement at higher altitudes, reflecting reduced allergen exposure. While this observation supports the role of environmental factors in disease expression, relocation or altitude-based strategies are not practical for most patients, and standard medical management remains the cornerstone of care.
When to See a Dust Mite Allergy Specialist
You should consider specialist assessment if:
✔ Symptoms are persistent throughout the year
✔ Usual hay fever or rhinitis treatment is not working well enough
✔ You have asthma symptoms triggered indoors or at night
✔ Dust exposure or bedding clearly worsens symptoms
✔ You want to explore allergy immunotherapy options
Specialist assessment can help distinguish dust mite allergy from other causes of chronic nasal and respiratory symptoms and identify whether immunotherapy may be appropriate.
Why Choose the London Allergy and Immunology Centre?
Our clinics provide personalised care for both children and adults with allergic rhinitis, allergy-related asthma and complex allergy presentations.
Specialist Diagnosis
Targeted allergy testing and consultant-led assessment to identify whether dust mite allergy is truly driving symptoms.
Evidence-Based Treatment
Medication review, environmental advice and immunotherapy pathways informed by current evidence and guideline-based care.
Convenient Access
In-clinic appointments in London and remote consultations across the UK for initial assessment and follow-up planning.
Book a Dust Mite Allergy Consultation
If you are struggling with year-round sneezing, blocked nose, itchy eyes, cough or allergy-related asthma, specialist assessment may help identify whether house dust mite allergy is the cause.
Arrange Allergy Testing and Treatment
Book a consultation for dust mite allergy, allergic rhinitis, asthma and allergy immunotherapy assessment.
For patients with persistent dust mite symptoms, treatment suitability should always be based on clinical history, allergy testing and specialist assessment.