Why can’t I take a deep breath?
The feeling of not being able to fill your lungs is common, frightening and usually not what it seems. What it often is, and when to get it checked.
Read this first
If breathlessness is sudden or severe, or comes with chest pain, blue lips, confusion or fainting, treat it as an emergency and call your local emergency number. This page is about a persistent, low-grade feeling of not being able to breathe deeply enough — not about acute breathlessness.
It is a strange and unsettling sensation: you can breathe, the air is going in and out, but no breath feels like it properly lands. People describe it as air hunger, or as needing to yawn constantly to get one satisfying breath.
It is common, and it is frightening precisely because breathing is the thing you are least willing to have go wrong. It is also, in a large proportion of cases, not a problem with your lungs.
Why it is often self-reinforcing
Here is the loop that catches people. The feeling makes you try to take a bigger breath. Bigger breaths lower your carbon dioxide. Low carbon dioxide produces light-headedness, tingling and — crucially — more of the air-hunger feeling. So you try an even bigger breath.
The way out is counterintuitive and hard to believe while it is happening: breathe *less*, not more. Smaller, slower breaths let carbon dioxide come back up, and the sensation usually eases within a few minutes.
Anxiety is frequently part of this, but saying so is not the same as saying the feeling is imaginary. The sensation is real and physically generated. It is the interpretation, and the response to it, that make it persist.
What to try
Resist the urge to take a big breath. Set a gentle rhythm instead — four seconds in through the nose, six out, and keep the breaths deliberately small. It will feel insufficient at first. Give it three or four minutes before judging it.
Do not do fast breathing, and do not do breath-holds, while this is happening. Both make it worse.
Other common causes worth knowing about
- Poor posture and a stiff upper back, which mechanically limit how much the ribcage can move.
- Habitual chest breathing, where the diaphragm has effectively been sidelined by the neck and shoulder muscles.
- The tail end of a chest infection, where the pattern outlasts the illness.
- Reflux, which can produce throat tightness that reads as breathing difficulty.
- Asthma, anaemia, thyroid problems and heart conditions — all of which need a doctor rather than a breathing exercise.
When to get it checked
See a doctor if it is new and persistent, if it is getting worse, if it comes on with exertion when it did not before, if it wakes you at night, or if it comes with chest pain, palpitations, swollen ankles, a cough that will not settle, or unexplained weight loss.
You do not need to have ruled anything out before asking. "I keep feeling like I cannot get a full breath" is a perfectly good reason to make an appointment, and it is a familiar presentation to any GP.
Where this comes from
Starting points for reading rather than a systematic review. None of these authors are connected with this site.
- Zaccaro A, Piarulli A, Laurino M, et al. (2018). How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing — Frontiers in Human Neuroscience. A systematic review of what slow breathing does to the body and to how people report feeling. Useful for seeing both the consistent findings and how varied and small the underlying studies are.
This is information, not medical advice
Breathing exercises are not a treatment for any condition, and nothing here is tailored to your situation. See the medical disclaimer, which lists the circumstances in which you should speak to a clinician before trying these.