Noisy breathing

Category: Lungs & Breathing · All lungs & breathing symptoms

What it can feel like

Noisy breathing means breathing you can hear without a stethoscope — whistling, rattling, snoring-like or harsh crowing sounds. A harsh sound mainly on breathing in, called stridor, comes from narrowing of the upper airway and in children is always a reason for urgent assessment.

Possible causes

A symptom can have many causes, and most are not serious. The lists below group conditions this symptom can be associated with — common causes first. They are possibilities to discuss with a clinician, not a diagnosis.

Common causes

Noisy breathing can be associated with nasal congestion, snoring and sleep apnoea, mucus in the airways during a chest infection, and in toddlers with viral croup, which causes a barking cough and noisy in-breaths.

Other possible causes

Stridor can be associated with swelling of the upper airway from allergy or infection, with an inhaled foreign body, and with narrowing of the voice box or windpipe — causes that can progress quickly.

Red flags — when to seek help promptly

Noisy breathing in a child who is drooling, struggling or unusually quiet — emergency
Stridor with lip, tongue or face swelling after food, a sting or a medicine — emergency
Noisy breathing that starts suddenly after choking
Noisy breathing with blue lips or severe breathlessness

What a clinician may do

Assessment focuses on the airway first: observations, oxygen levels, listening to neck and chest, and sometimes a camera look at the voice box. In children with croup, response to treatment is closely watched; imaging is used carefully and only when the airway is safe.

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Frequently asked questions

What is the difference between stridor and wheeze?

Stridor is a harsh, often single-pitch sound loudest over the neck and mainly on breathing in — it signals upper-airway narrowing. Wheeze is a musical whistling from the chest, mainly on breathing out. The distinction matters because the causes and urgency differ.

My toddler's cough sounds like a bark — is that croup?

A barking cough with noisy in-breaths, worse at night, in a toddler is the classic sound of viral croup. Cool night air often helps, but a child who is struggling to breathe, drooling or unusually drowsy needs emergency care.

Related symptoms — Lungs & Breathing

Breathlessness Bringing up phlegm Chest infections that keep coming back Cough Coughing up blood Pain when breathing in

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Please note: This page is educational information about a symptom. A symptom alone cannot diagnose any condition, and the causes listed here are possibilities, not a diagnosis. If you are worried about a symptom — especially one that is new, severe, getting worse or not going away — please see your own clinician, who can examine you and arrange tests. In an emergency, call your local emergency number.