Shortness of Breath When Lying Down | Causes and Fixes
Shortness of breath when lying down? Why it happens, causes from sleep apnea and obesity to asthma and the heart, when it's serious, and how to sleep.
You lie on your back to sleep and your chest feels tight, so you reach for another pillow just to breathe. Shortness of breath when lying down usually comes from obesity, sleep apnea, asthma or COPD, acid reflux, and sometimes a weak heart. Changing position eases it, but finding the cause decides the treatment.
This guide explains why breathing gets harder when you lie flat, when it is serious, and how each cause is treated.
Why do I get short of breath when lying on my back?
When you stand or sit, gravity helps your lungs expand easily. When you lie on your back, three things happen:
Blood shifts from your legs and lower abdomen towards your chest, as Cleveland Clinic explains. This is no problem for most people, but it adds strain on a weak heart or diseased lungs.
The diaphragm moves up, especially with a large belly or in pregnancy, leaving less room for the lungs.
The tongue and soft tissues fall back and narrow the airway, which is why snoring and sleep apnea get worse on your back.
The medical name for shortness of breath when lying down is orthopnea. Waking suddenly from sleep gasping and very breathless is called paroxysmal nocturnal dyspnea, and it needs a faster assessment.
Needing an extra pillow every night just to breathe?
Shortness of breath when lying down has a cause that can be diagnosed and treated. A consultant in pulmonology and sleep medicine can find out whether it starts in the lungs, the airway or your sleep.
Book a sleep disorders consultation
Living outside Riyadh? Book an online sleep consultation
What causes shortness of breath when lying down?
There are several causes, and more than one can affect the same person:
Obesity and hypoventilation
Fat around the neck, chest and abdomen makes deep breathing harder, and more so when lying down. In some people this leads to obesity hypoventilation syndrome, where carbon dioxide builds up and oxygen falls in the blood. The US National Heart, Lung, and Blood Institute notes that most people with it also have sleep apnea.
Sleep apnea
The airway narrows or closes many times a night, so you wake feeling as if you are choking. It gets clearly worse on your back, as the next section explains.
Asthma and COPD
Asthma symptoms often get worse at night. Cleveland Clinic notes that more than half of adults with asthma have night-time attacks. Bedding dust mites, postnasal drip and lower levels of some hormones at night all play a part.
Acid reflux
Stomach acid rises more easily when you lie down, which can cause coughing, irritate the airway or trigger an asthma attack.
A weak heart
When the heart doesn't pump well, fluid can collect in the lungs and shift with gravity when you lie down, making breathlessness worse. Signs include swollen feet and needing more pillows over time.
Pregnancy
In late pregnancy, the womb presses on the diaphragm, so breathing feels tighter when lying on your back.
Less common causes
These include a weak or paralysed diaphragm, fluid around the lungs or in the abdomen, and high blood pressure in the lungs.
Anxiety and panic attacks
These can cause a choking feeling when lying down, especially with racing thoughts before sleep. But this diagnosis is made only after physical causes have been ruled out.
Positional sleep apnea: when your back is the problem
In many people with sleep apnea, breathing pauses become clearly more frequent on the back and fewer on the side. In a large US study published in the Journal of Clinical Sleep Medicine, 63.9% of people with sleep apnea had at least twice as many pauses on their back as on their side.
That is why shortness of breath when lying down, together with snoring and frequent waking, may be a sign of undiagnosed sleep apnea. The Saudi Ministry of Health advises people with sleep apnea to sleep on their side and avoid sleeping on their back.
Signs that point to sleep apnea:
Loud snoring that gets worse on your back
Pauses in breathing noticed by your bed partner
Waking up choking or gasping
Morning headaches and a dry mouth
Snoring and choking every time you sleep on your back?
A home sleep apnea test measures your breathing and oxygen during sleep, and shows whether sleep apnea is worse on your back, all in your own bed within Riyadh.
💬 Ask about the test on WhatsApp
Is shortness of breath when lying down serious?
Not always. In a study of more than 5,700 people over 65, fewer than 20% of those who were breathless lying down or woke up gasping actually had heart failure. In other words, shortness of breath when lying down has many causes other than the heart, and most can be treated.
But some situations need an ambulance straight away, as Mayo Clinic explains:
Severe, sudden breathlessness, or breathlessness with chest pain, fainting, or blue lips or nails: call emergency services (997 in Saudi Arabia) straight away
A sudden change in alertness or awareness
New breathlessness after a long journey or a long period of inactivity
Book an appointment soon, without waiting, if:
You need more pillows to breathe
You wake up choking or gasping
The breathlessness comes with swollen feet or ankles
It comes with wheezing, or a fever and cough
How to treat shortness of breath when lying down
Treatment for shortness of breath when lying down depends on the cause, so it always starts with a diagnosis:
Changing your sleeping position
Sleeping on your side and raising your head and upper body ease breathlessness in most cases, especially with snoring, sleep apnea and reflux. Cleveland Clinic suggests a foam wedge pillow or an adjustable bed rather than piling up pillows.
Losing weight
Losing weight reduces pressure on the chest and diaphragm, and improves sleep apnea and hypoventilation. To learn more about how weight affects breathing, read our article on whether being overweight causes shortness of breath.
Positive airway pressure (CPAP)
The main treatment for sleep apnea and obesity hypoventilation. It keeps the airway open through the night, so choking and waking happen less.
Inhalers and medicines for asthma and COPD
Your pulmonologist adjusts these to the severity of your condition, and may change their timing to cover the night.
Treating reflux
Avoid eating for two to three hours before bed, raise the head of the bed, and take any medicines your doctor prescribes.
Treating a weak heart
This is managed by a cardiologist and may include diuretics to reduce fluid. Don't start any medicine of this kind on your own.
Shortness of breath when lying on your left or right side
Sometimes breathlessness doesn't only happen on your back, but on one side only. Known medical explanations include:
Some people with heart failure feel more comfortable on their right side and more breathless on their left.
In lung disease that affects one lung, people often feel better lying on the healthy side.
With fluid around one lung, it may be the other way round.
If one side consistently makes you breathless, tell your doctor, as it helps guide the diagnosis.
How doctors find the cause
Because there are so many causes, the doctor starts by asking when the breathlessness begins, how many pillows you need, and about snoring, cough and swollen feet. Depending on your case, they may then order:
A chest X-ray
An ECG and an echocardiogram (heart ultrasound)
A blood test for a marker of heart strain
Lung function tests, sometimes sitting and then lying down to check for diaphragm weakness
A sleep study if sleep apnea is suspected
Breathlessness with a cough or wheezing?
If shortness of breath when lying down comes with a cough, wheezing, or a history of asthma or smoking, it is best to start with a pulmonology consultation, which includes lung function assessment.
Book a pulmonology consultation
💬 Ask about your case on WhatsApp
How to sleep with shortness of breath
Until the cause is clear, these steps may ease shortness of breath when lying down:
Sleep on your side, with a pillow behind your back so you don't roll over during the night.
Raise your head and chest with a wedge pillow, not just your head.
Avoid heavy meals for two to three hours before bed.
Wash your bedding weekly in hot water to cut down dust mites.
Keep the room well ventilated, and don't smoke in it.
Keep your asthma inhaler by the bed if one has been prescribed.
Keep track of how many pillows you need, and tell your doctor if it goes up.
Do herbal remedies help?
Many people look for herbal remedies, but no herb has been shown to treat shortness of breath when lying down, because the cause is usually in the heart, lungs or airway. Warm steam or a warm drink before bed may soothe the throat and nose for a while, but it doesn't treat the cause.
More importantly, some herbs interact with heart, blood pressure and blood-thinning medicines. So check with your doctor before any herbal remedy, and don't delay a diagnosis hoping herbs will be enough.
Why Subat Clinics?
Shortness of breath when lying down sits between two specialties: pulmonology and sleep medicine. At Subat Clinics both are under one roof:
A consultant in pulmonology to assess asthma and COPD, including lung function assessment
A consultant in sleep medicine to diagnose sleep apnea and obesity hypoventilation
Home sleep studies within Riyadh that show whether sleep apnea is worse on your back
Online consultations for patients outside Riyadh
How to prepare for your appointment
These details help the doctor find the cause of your shortness of breath when lying down:
How many pillows you need to breathe, and whether that has gone up recently
Whether the breathlessness eases when you sit up or lie on one side
Notes from your bed partner about snoring or breathing pauses
Any cough, wheezing or swollen feet
Your medicines and inhalers
Your current weight, and whether it has gone up recently
Conclusion
There is no single treatment for shortness of breath when lying down, because the cause may be obesity, sleep apnea that gets worse on your back, asthma or COPD, reflux, or a weak heart. Sleeping on your side and raising your chest ease the symptoms, but a diagnosis decides the right treatment. If the breathlessness is severe and sudden, or comes with chest pain or blue lips, the emergency department is the right place.
Book your appointment
Don't get used to sleeping sitting up or on three pillows. Book now and start by finding the cause.
Choose the service that suits you and book directly:
Pulmonology consultation for cough, wheezing and asthma
Sleep disorders consultation for snoring and choking during sleep
Online sleep consultation for patients outside Riyadh
Address: Othman Ibn Affan Road, Al-Taawun District, Riyadh 12477
Phone: 0112011100
WhatsApp: 0505999713
The clinic is not an emergency facility. For severe or sudden breathlessness, call 997 or go to the nearest hospital.
Sources
Positional sleep apnea in the MESA study (Journal of Clinical Sleep Medicine 2023)
Heart Failure Matters — Waking up breathless or needing more pillows
This content is for health awareness and does not replace a personal medical consultation. Do not start any medicine, diuretic or herbal remedy without your doctor's advice.
Medically reviewed by: Dr. Sami Al-Yami, Consultant in Pulmonary Medicine and Sleep Medicine, Subat Clinics
Last reviewed: October 2026
Frequently asked questions
Is sleeping upright in a chair a long-term fix?
It may help for a while, but it breaks up sleep and hides the cause. A wedge pillow plus a diagnosis of the cause is the better approach.
Can seasonal allergies cause shortness of breath when lying down?
Yes. Nasal congestion and postnasal drip get worse when lying down, and can trigger coughing or an asthma attack in people with asthma.
Does breathlessness that started in pregnancy go away after birth?
It usually improves after birth as the womb stops pressing on the diaphragm. But severe or sudden breathlessness during pregnancy needs urgent assessment.
Does smoking affect breathing at night?
Yes. It irritates the airway, increases mucus and, over time, leads to COPD. Quitting is one of the most important steps to better breathing.