What should you know about hay fever dust allergy?

House-dust mites live in bedding, mattresses, carpets and upholstered furniture. Their particles can irritate the immune system and cause sneezing, a runny or blocked nose, itchy eyes or an itchy throat. Symptoms may be strongest in bedrooms, while cleaning, making the bed or disturbing fabrics can stir particles into the air. Outdoor pollen and indoor mite exposure can coexist, so timing and surroundings are useful clues rather than proof of the trigger. People with asthma may notice cough, wheeze or chest tightness when allergies flare.

Wash bedding regularly at the hottest temperature permitted by the fabric-care label and use mite-resistant covers if a clinician or pharmacist recommends them. Reduce bedroom clutter, damp-dust surfaces and ventilate to limit dampness. A vacuum with effective filtration may help, although cleaning can briefly disturb particles, so consider leaving the room while it settles. Saline rinsing can ease nasal irritation. Allergy treatments may control symptoms; a clinician can advise whether allergy testing would clarify the trigger before you make major changes at home.

Book an assessment if symptoms are persistent, disturb sleep, limit activity or continue despite exposure reduction. Seek urgent help for severe breathing difficulty, blue or pale lips, faintness, or rapidly worsening facial or throat swelling. Recurrent wheeze or night cough deserves review, particularly if you have asthma.

Ask whether your pattern suggests mites, pollen or another trigger, whether testing is useful, which treatments fit your medicines, and how to respond if chest symptoms occur.