Last updated: October 2026
Dust mite allergy is a reaction to droppings from tiny mites that live in bedding, mattresses, carpets and soft furnishings. It causes sneezing, a blocked or runny nose, itchy eyes and coughing, often worst at night and first thing in the morning. Washing bedding at 60C, keeping humidity down and pharmacy treatments all help.
Below: the symptoms, why they flare in bed and in winter, the “dust mite bites” myth, a room-by-room checklist, what actually works and when to see a GP.
The short version: you can’t get rid of dust mites completely. The aim is less allergen where you spend the most time, which is your bed. Hot washes, a drier bedroom and treating your nose properly make the biggest difference.
What is a dust mite allergy?
House dust mites are about a quarter of a millimetre long, too small to see. They feed on the skin flakes we shed, like warm, humid conditions and live in bedding, carpets, soft furnishings and clothing. Allergy UK says they can’t be completely removed from a home, however clean it is.
The mites aren’t the problem; a protein in their droppings is. Each mite produces around 20 droppings a day, and the particles get stirred into the air when you turn over in bed, shake a duvet or vacuum. In sensitive people, breathing them in triggers allergic rhinitis (inflammation inside the nose). You’re more likely to react if allergies, eczema or asthma run in your family.
Because mites are around all year, symptoms are often year-round rather than seasonal like hay fever, so many people mistake them for a cold that never clears. See cold or flu for how a cold usually behaves.
Dust mite allergy symptoms
The NHS and Allergy UK list:
- sneezing
- a runny, blocked or itchy nose
- postnasal drip (mucus running down the back of your throat)
- an itchy throat or roof of the mouth
- a cough
- red, itchy or watery eyes
- tiredness
- itchy skin or eczema that gets worse
- asthma symptoms such as wheezing, a tight chest or breathlessness
Allergy UK notes that symptoms can be set off by changing the bedding, doing housework or sleeping in an older, damp house. Clues that point to dust mites rather than a cold: a nose that has been blocked for weeks, no fever or aches, and symptoms that ease when you’re away from home.
Why is dust mite allergy worse at night and in the morning?
Allergy UK says symptoms “often appear at night, or first thing in the morning”, because so much of your exposure happens in bed. Your mattress, pillow and duvet are warm, slightly damp from breath and sweat, and full of shed skin. One NHS hospital leaflet calls the bedroom the mites’ main source of food and warmth, as we spend a third of every day there.
Your face is close to the pillow for hours, and every time you turn over you puff allergen into the air you breathe. Many people wake with a blocked nose, a dry throat and a tickly cough that eases by lunchtime. Making the bed straight away traps warmth and moisture in, which is why NHS advice suggests airing it first.
Why is dust mite allergy worse in autumn and winter?
Allergy UK says symptoms tend to get worse in autumn and winter. In a UK home, that usually means:
- Heating on, windows shut. Warm, still air suits mites, and insulated, double-glazed homes hold on to moisture.
- Washing dried indoors. An NHS hospital leaflet singles out clothes drying over radiators as a source of the humidity mites thrive on.
- Heavier bedding and throws coming out of storage.
Allergy UK suggests starting your usual treatment at least two weeks before symptoms usually begin, so early autumn is a sensible time if this happens every year. See also our winter wellness guide and sleeping well when the clocks go back.
Do dust mites bite? (No.)
“Dust mite bites” is one of the most searched phrases on this topic, but house dust mites don’t bite. They feed on shed skin flakes, not blood, and don’t live on people. Itchy skin from a dust mite allergy is an allergic reaction, usually worsening eczema or general itch, not bite marks. If you’re waking with new red bumps, something else is more likely:
| What you notice | More likely to be | What to look for |
|---|---|---|
| Blocked nose, sneezing, itchy eyes, worse in bed | Dust mite allergy | No marks; year-round, worse at night and in the morning |
| Itchy, dry patches that flare | Eczema, which the NHS says house dust mites can make worse | Itchy skin that can be dry, cracked, scaly or thickened |
| Raised itchy bites in a line or group on the face, neck or arms | Bed bugs | Spots of blood or small brown spots on bedding or furniture |
| Raised itchy welts that come and go | Hives | Ask a pharmacist; see a GP if it keeps coming back |
The NHS notes that on black or brown skin, bed bug bites may look brown, red or purple and be harder to see. If you think you have bed bugs, contact your local council or a pest control service.
How dust mite allergy affects your sleep
When your nose is blocked at night you switch to mouth breathing, which dries your mouth and throat, makes snoring more likely and leaves sleep lighter and more broken.
A 2020 review of 27 studies found people with allergic rhinitis had worse sleep quality, took longer to fall asleep and were more likely to report insomnia, snoring, sleep-disordered breathing, daytime sleepiness and morning headaches. The evidence was low quality, so it shows a link rather than proof. Encouragingly, a 2025 review of 18 trials with 6,019 people found steroid nasal sprays improved sleep quality scores compared with a placebo spray.
If you snore or wake unrefreshed, read how to stop snoring and why you wake up tired. Don’t tape your mouth while your nose is blocked: our mouth taping guide explains why a clear nose comes first. If someone notices you stop breathing or gasp in your sleep, read about sleep apnoea and speak to your GP.
How to reduce dust mites: a room-by-room checklist
Start with the bedroom. These steps come from NHS and Allergy UK advice.
Your bed
- Wash sheets, pillowcases and duvet covers weekly at 60C or above. Allergy UK says 60C kills mites; cooler washes only rinse allergen away for a while.
- Air the bed each morning before making it.
- Choose synthetic pillows and duvets you can wash hot, rather than feather.
- Replace pillows about every six months, or use barrier covers, as one NHS leaflet suggests.
- Vacuum the mattress weekly, including the seams.
- Barrier covers, if you use them, should be breathable, fully enclose the item and zip shut. Use them as part of a wider plan, not on their own.
The rest of the bedroom
- Keep humidity under 50% but above 30%. Open the window for a while each day, even in winter, and use a dehumidifier if the room stays damp. A simple hygrometer shows you the level.
- Don’t overheat the room. See the best temperature for sleep.
- Damp dust rather than dry dusting, and vacuum with a HEPA filter.
- Swap heavy curtains for washable ones or blinds, and keep clutter away from the bed.
- Keep pets out of the bedroom.
- Hard floors are easier than carpet if you’re redecorating anyway.
Children’s rooms and soft toys
- Keep soft toys to a few favourites, ideally off the bed, and wash them at 60C.
- If a toy can’t take 60C, Allergy UK suggests sealing it in a bag in the freezer for at least 12 hours once a month, then washing it as normal.
- Always ask a pharmacist or GP before giving a child any allergy medicine.
Living room, kitchen and bathroom
- Vacuum sofas, including the arms and seat edges, and wash throws and cushion covers hot.
- Use extractor fans or open a window while cooking and showering.
- Avoid drying clothes on radiators, and deal with damp and condensation.
These steps work best together, and the effect builds gradually. For the rest of your bedtime set-up, see our sleep hygiene habits.
What works and what has weak evidence
Most measures cut the number of mites and the amount of allergen. Whether that means fewer symptoms is less certain, and single measures on their own tend to disappoint.
| Measure | What the evidence says | Verdict |
|---|---|---|
| Washing bedding at 60C or above | Kills mites; cooler washes only remove allergen temporarily (Allergy UK) | Worth doing weekly |
| Humidity under 50% | Lab work found keeping average daily humidity below 50% held back mite populations, even with short daily spikes | Worth doing |
| Freezing soft toys | Kills mites (Allergy UK, NHS leaflets); no trials on symptoms | Cheap and sensible |
| Allergen-proof covers on their own | A Cochrane review (9 trials, 501 people) found covers alone are unlikely to help rhinitis symptoms | Only as part of a full plan |
| A full bedroom programme | The same review found extensive bedroom-based programmes may give some benefit, though trials were small | Best bet if you try avoidance |
| Mite-killing sprays (acaricides) | Most promising in the Cochrane review, but the trials were small and poor quality | Uncertain |
| HEPA air filters | Only two small trials in the Cochrane review, not singled out as promising | Weak evidence |
| Avoidance to treat asthma | A Cochrane review of 54 trials (3,002 people) concluded these methods can’t be recommended for asthma | Treat asthma properly |
A 2025 meta-analysis of 17 trials agreed: avoidance lowered dust and allergen levels, but not enough to clearly improve asthma, rhinitis or quality of life. A sensible home routine plus proper treatment for your nose beats spending a lot on any single gadget. As Allergy UK says, the only way to know if avoidance helps you is to try it.
Better sleep while you sort your bedroom
Keep regular sleep and wake times, a cool dark bedroom and a calm wind-down. Our 60-minute bedtime routine and tips for sleeping with a blocked nose both apply here.
Some people like a warm, caffeine-free drink as part of that routine. Our Magnesium Glycinate Sleep Complex is a berry-flavoured bedtime drink with magnesium bisglycinate and citrate, glycine and L-theanine; magnesium contributes to the reduction of tiredness and fatigue. It isn’t an allergy treatment and won’t change dust mite symptoms. It’s for adults only and contains chamomile, passionflower and hops, so check the label if you have plant allergies. More in magnesium for sleep.
Treatments from a pharmacist or GP
Cutting exposure helps, but most people also need treatment. The NHS says a pharmacist can recommend:
- Antihistamines, for sneezing, itching and a runny nose.
- Steroid nasal sprays, for a blocked nose. Ask the pharmacist how long to use them for.
- Salt water nasal sprays or rinses, to wash allergen out of the nose.
- Decongestant sprays or drops, short term only: the NHS says no more than 5 days, as longer can make a blocked nose worse, and not for children under 6.
If these don’t help, a GP can prescribe stronger treatments and arrange a skin prick test or blood test. Allergy UK has a free symptom questionnaire you can print and take along.
For people who are severely affected there is immunotherapy (desensitisation): careful exposure to the allergen over time so your body reacts less. The NHS says it should only be done by a medical professional, and Allergy UK explains it needs a GP assessment and referral to an allergy specialist.
When to see a GP
- Symptoms are getting worse, or affecting your sleep or daily life.
- Pharmacy treatments haven’t helped, or you’re not sure what’s causing your symptoms.
- You have asthma and it’s getting worse.
- Your child has a constantly blocked nose, or snores or mouth breathes at night.
Call 999 if someone is having an asthma attack (severe wheezing, coughing, a tight chest, finding it hard to breathe) and their symptoms get worse, don’t improve after using their reliever inhaler at the maximum dose, or they don’t have an inhaler. After an asthma attack, see a GP within 2 days, even if you feel better.
If you’re still exhausted once your nose is under control, see why am I always tired?
FAQs
What are the symptoms of a dust mite allergy?
Sneezing, a runny, blocked or itchy nose, postnasal drip, an itchy throat, coughing, watery eyes, tiredness and worsening eczema or asthma. Symptoms are often year-round and worst at night or first thing in the morning.
Do dust mites bite?
No. House dust mites feed on shed skin flakes, not blood, and don’t live on people. Itchy bites in a line or group are more likely to be bed bugs; an itchy flare of dry skin may be eczema.
Why is my dust mite allergy worse at night?
Your bed is warm, slightly damp and full of shed skin, so it holds a lot of mites and allergen, and your face is close to the pillow for hours.
How do I get rid of dust mites in my bed?
You can’t remove them completely, but wash bedding weekly at 60C or above, air the bed before making it, vacuum the mattress, use washable synthetic pillows and duvets, and keep bedroom humidity under 50%.
Do allergen-proof mattress covers work?
On their own, probably not much. A Cochrane review found covers used alone are unlikely to help rhinitis symptoms. They make more sense as part of a full bedroom plan.
Can you be tested for a dust mite allergy?
Yes. A GP can arrange a skin prick test or blood test, or refer you to an allergy clinic.
Sources
- NHS. Allergic rhinitis.
- NHS. Allergies.
- NHS. Asthma (including what to do in an asthma attack).
- NHS. Bedbugs.
- Allergy UK. House dust mite allergy and house dust mite allergy factsheet.
- East Kent Hospitals University NHS Foundation Trust. House dust mite allergy advice (patient leaflet).
- Sheikh A et al (2010). House dust mite avoidance measures for perennial allergic rhinitis. Cochrane Database of Systematic Reviews.
- Gøtzsche PC, Johansen HK (2008). House dust mite control measures for asthma. Cochrane Database of Systematic Reviews.
- Sobczak M et al (2025). Are there effective methods to reduce exposure to house dust mite allergens? A meta-analysis of randomized clinical trials. International Forum of Allergy and Rhinology.
- Arlian LG et al (1999). Reducing relative humidity to control the house dust mite Dermatophagoides farinae. Journal of Allergy and Clinical Immunology.
- Liu J et al (2020). The association between allergic rhinitis and sleep: a systematic review and meta-analysis of observational studies. PLoS One.
- Tabata K et al (2025). Effectiveness of intranasal corticosteroids for sleep disturbances in patients with allergic rhinitis: a systematic review and meta-analysis. International Archives of Allergy and Immunology.
This guide is general information, not medical advice. Evopure makes the Magnesium Glycinate Sleep Complex, which is not a treatment for allergies.
