House Dust Mite
A microscopic organism in bedding and soft furnishings, and a common allergen.
Last revised
Key takeaways
- Where they live: mattresses, bedding, carpets, soft furnishings
- Evidence for avoidance measures: limited for symptom improvement
- Most useful single change: Wash bedding weekly at 60C.
- Commonest mistake: Spending heavily on avoidance products expecting large benefit.
- See a doctor if any of the signs under "When to get help" below apply to you.
Why it matters
Avoidance measures are widely recommended and the evidence that they improve symptoms is weaker than most people assume.
The numbers, in one place
| Measure | Figure |
|---|---|
| Where they live | mattresses, bedding, carpets, soft furnishings |
| Evidence for avoidance measures | limited for symptom improvement |
| Washing bedding | at 60C kills mites |
| Humidity | mites thrive in humid conditions |
What helps
- Wash bedding weekly at 60C
- Ventilate bedrooms and reduce humidity
- Treat the allergy itself with nasal steroid and antihistamine
- Judge any measure by whether your symptoms actually change
What to avoid
- Spending heavily on avoidance products expecting large benefit
- Assuming avoidance replaces medical treatment
- Drying washing indoors without ventilation
Where to go next
- What the Guidance Really Says About House Dust Mite
- Understanding House Dust Mite: A Plain-English Explainer
- What the Guidance Really Says About Insect Stings
- The Evidence on Living with Severe Allergy, Without the Hype
When to get help
Contact a GP if asthma or nasal symptoms are not controlled despite regular treatment. Call 999 for severe breathlessness or inability to speak in full sentences. Persistent nasal symptoms with facial pain, one-sided blockage or bleeding need assessment rather than allergy treatment.
Where this comes from
- NICE — Allergic rhinitis clinical knowledge summary
- Asthma + Lung UK — triggers
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.