Allergies and wheezing at night

Wheezing is a high-pitched sound caused by air moving through narrowed airways. Asthma commonly presents with wheezing that varies over time and can disturb sleep. Allergens in bedding, dust, mould, pet dander or pollen carried indoors may contribute, while lying down, cooler air or a respiratory infection can also make symptoms more noticeable.

Allergic rhinitis may add nasal blockage, sneezing or an itchy nose, but wheezing comes from the lower airways. A clinician may ask about cough, chest tightness, daytime exercise symptoms, recent illness, smoking or vaping exposure, and whether the sound occurs on breathing out.

Sit upright, move away from smoke, perfume or any suspected trigger, and stay calm while assessing your breathing. If you have a prescribed reliever inhaler and a written asthma plan, follow its directions. Do not borrow another person's inhaler or start a nebuliser without clinical guidance.

Arrange an appointment if wheezing recurs, wakes you, limits activity or requires your reliever more often than your plan allows. Note the timing, room, exposures, accompanying symptoms and response to prescribed medicine. Washing bedding as directed, reducing visible dust and repairing damp areas may reduce exposure, although trigger control does not replace airway treatment.

Call emergency services for severe breathing difficulty, trouble speaking in full sentences, blue or grey lips, confusion, faintness, or symptoms that worsen rapidly despite prescribed reliever medicine. Wheezing with swelling of the tongue or throat, widespread hives, vomiting or collapse after a possible allergen exposure can signal anaphylaxis; use prescribed emergency adrenaline immediately and call emergency services.

Seek prompt medical assessment for a first episode of wheezing, persistent fever, chest pain, or steadily worsening symptoms, particularly in a young child or a person with known lung disease.

Ask whether the pattern fits asthma or another airway problem, whether breathing tests are suitable, which triggers are worth addressing, and how to check inhaler technique. Request clear instructions covering everyday treatment, worsening symptoms, reliever use and the point at which emergency help is needed.