Waking up breathless

Category: Lungs & Breathing · All lungs & breathing symptoms

What it can feel like

Waking up breathless means being woken from sleep by a feeling of suffocation or air hunger, often needing to sit up or stand, or dangle your legs over the bed, before it eases. Breathlessness that is worse lying flat is closely watched by clinicians because of its link with the heart.

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

Waking breathless can be associated with heartburn reflux reaching the airway, post-nasal drip, asthma that dips at night, panic attacks during sleep, and sleep apnoea.

Other possible causes

Breathlessness that forces you to sleep propped up on extra pillows, or wakes you gasping an hour or two after falling asleep, can be associated with heart failure, where fluid collects in the lungs when lying flat. It can also occur with significant lung disease.

Red flags — when to seek help promptly

Waking breathless with chest pain or frothy, pink phlegm — emergency
Needing more and more pillows to sleep comfortably
Night-time breathlessness with swollen ankles and rapid weight gain
Breathlessness lying flat that is new for you

What a clinician may do

A clinician will ask how many pillows you use and how the episodes behave, examine heart and lungs, and arrange blood tests including a heart strain test (BNP), an ECG and often an ultrasound scan of the heart, plus a chest X-ray.

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Frequently asked questions

Why does lying flat make it worse?

Lying flat redistributes fluid from the legs into the circulation and lungs. A healthy heart handles this easily; a struggling heart cannot, and fluid gathers in the lungs — which is why sitting up brings relief within minutes.

Is it the same as sleep apnoea?

Not exactly — sleep apnoea causes pauses in breathing, snoring and unrefreshing sleep rather than classic sitting-up gasping, though the two can coexist. Describing exactly what happens at night helps your clinician separate them.

Related symptoms — Lungs & Breathing

Breathlessness Bringing up phlegm Chest infections that keep coming back Cough Coughing up blood Noisy breathing

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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.