Emergency? Call 911.
Our emergency rooms are open 24/7, holidays included.
Health Library
Published September 17, 2026 · 6 min read
Call 911 for lips or fingernails turning blue or grey, for anybody who cannot finish a sentence without stopping for breath, for a rescue inhaler that is not working, or for confusion or drowsiness with breathlessness. Do not drive yourself.
Two facts from the American College of Emergency Physicians, and between them they undo how most people judge a breathing emergency.
The first: severe asthma attacks may have no wheezing. A chest that has gone quiet is not a chest that has settled — moving too little air to make a noise is worse than moving enough air to whistle.
The second: fatal asthma attacks often occur with few warning signals.
So the two things people wait for — a dramatic wheeze, and a clear warning that this one is different — are both unreliable. Which means you need a test that does not depend on either.
ACEP names it among the reasons to go: “the inability to complete a sentence without pausing for breath.”
Say something. A whole sentence, normally.
If it has to be broken into pieces to get enough air, that is a severe presentation regardless of how anybody feels about it, regardless of wheezing, and regardless of whether it has happened before. It is the most useful bedside test available to a family, and it takes four seconds.
And watch how somebody is sitting. ACEP lists “hunching of shoulders, straining of abdominal and neck muscles or sitting or standing to breathe more easily.” A person who will not lie down, or who is leaning forward and using their neck and stomach to breathe, is working far harder than they will admit to.
Colour change. ACEP: “Lips or fingernails are turning blue (or gray in persons with dark complexions).” Note that clause — on darker skin the change shows grey rather than blue, and looking for blue is how it gets missed.
Cannot finish a sentence, or is straining to breathe.
A rescue inhaler that is not working when it usually does. ACEP names an attack not relieved by a normally effective rescue inhaler as a reason to go.
Breathlessness even lying in bed — ACEP’s wording is “persistent shortness of breath or breathlessness experienced even while lying in bed.”
Agitation, confusion, or an inability to concentrate. Breathlessness with a change in thinking is not anxiety about the breathlessness. It goes at the top of the list.
Drowsiness, or difficulty waking. For somebody with COPD, ACEP names “sleepiness and difficulty awakening from sleep” explicitly.
And the whole-body picture. ACEP describes severe asthma symptoms accompanied by “severe sweating, faintness, nausea, panting, rapid pulse rate, and pale, cold, moist skin” as a reason to be in an emergency department.
ACEP says to call 911 or go to the closest emergency department for:
And on flare-ups, which is the judgement people with COPD make constantly: ACEP says that when symptoms “appear more suddenly than usual, or become severe or longer lasting, it may be necessary to get medical attention right away.”
The test is change from your own baseline, not comparison with anybody else. Somebody who lives with breathlessness is the world’s expert on their own normal, and a flare-up that arrived faster, went further, or has lasted longer than usual is the one to act on.
Fever with COPD is on that list, which surprises people — an infection on top of damaged lungs is a different event from an infection alone.
New, unexplained breathlessness in somebody with no lung condition is a reason to be seen, not a reason to wait for a pattern.
The National Library of Medicine’s guidance on recognising medical emergencies places difficulty breathing, changes in alertness, and chest pain among the situations calling for emergency help — and “I have never had this before” makes it more concerning, not less.
And breathlessness with chest pain is treated as cardiac until proven otherwise. What to do about chest pain applies.
Call 911 for any of the above, and do not drive yourself if you are the one who cannot breathe. Paramedics can begin treatment on the way, which a car cannot.
Come to an emergency room for breathlessness that is new, worse, or not responding to what normally works.
Our emergency rooms are open every hour of every day and are walk-in, with CT, X-ray and a full laboratory in the building. Go to the nearest one — and ACEP’s own wording is the closest emergency department, which is our standing advice too.
If you are unsure, come in — this list is not exhaustive and you are not expected to assess your own breathing while it is the thing that is failing.
I am wheezing loudly. Is that worse than not wheezing? Loud wheezing means air is moving. A severe attack can be quiet, which is why the sentence test and the colour check matter more than the noise.
My inhaler helped a bit but not much. Partial relief is not relief. ACEP names an attack not relieved by a usually effective rescue inhaler as a reason to go, and “a bit better” is the version people talk themselves into staying home on.
Could it just be anxiety? Sometimes, and you cannot tell from inside it, and confusion or agitation with breathlessness is on the emergency list rather than the reassurance list. Get assessed and let somebody rule things out with equipment.
It is a dusty day and I have asthma. Airborne particles are on the National Weather Service’s list of things that trigger asthma attacks, and that has its own page. If your breathing is worse than your usual bad day, act on it.
My lips look a bit dusky but it might be the light. Treat it as real. Check fingernails too, look in better light if you can do it in five seconds, and call 911 rather than deliberating.
I get this every winter and it always settles. Then you know your own pattern, and the question is whether this one is following it. Faster, further, or longer than usual means go.
Can they finish a sentence? Are their lips or nails blue or grey? Is the inhaler working? Any one of those is a 911 call. Both of our emergency rooms are open 24 hours a day, every day of the year — walk in, no appointment and no referral. Find your nearest emergency room →
Related reading: which door do you need · dust is not only a breathing problem
This article is general information, not a diagnosis, and it cannot adjust your asthma or COPD plan. It gives no doses. If you are unsure, come in — this list is not exhaustive and you are not expected to assess your own breathing. If it might be an emergency, treat it as one and call 911.
If it might be an emergency, treat it as one. Both of our emergency rooms are open 24 hours a day, every day of the year — walk in, no appointment and no referral.
Find your nearest emergency room →About your bill, before you worry about it
Ability to pay is not a barrier to assessment and access to care in our emergency rooms — by law. An emergency visit bills at emergency rates, which are not clinic rates, and we would rather tell you that now than have you find out afterwards.
If anything you receive after a visit is unclear, call the facility you were seen at before you pay it. They hold the record of your visit, and they would rather explain a statement than have you pay something you do not owe.