House dust mite allergy is a reaction to proteins in the waste and remains of microscopic mites that live in household dust. It commonly causes symptoms throughout the year and can worsen asthma or eczema.
Symptoms
- Sneezing and an itchy, runny or blocked nose
- Itchy, red or watery eyes
- Coughing, wheezing or chest tightness
- Worsening eczema or itchy skin
Seek urgent medical help for severe breathing difficulty, difficulty speaking, blue or gray lips, confusion or collapse.
Diagnosis
A healthcare professional will consider the pattern of symptoms and possible triggers. Skin prick or specific IgE blood testing may be useful when the diagnosis is uncertain or symptoms are difficult to control.
Reducing Exposure
Measures that may help include washing bedding regularly at a hot temperature when the fabric allows, using allergen resistant mattress and pillow covers, reducing indoor humidity and cleaning with a damp cloth. Vacuuming with a high efficiency filter can reduce airborne dust. Complete removal of dust mites is not possible, and expensive products do not guarantee symptom relief.
Treatment
Treatment may include antihistamines, corticosteroid nasal sprays, allergy eye drops and appropriate asthma or eczema treatment. A specialist may consider immunotherapy for selected people with confirmed allergy and persistent symptoms.
Sources
Reviewed 28 August 2026.