Breathing difficulty - lying down: when to get help
Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services if breathing is severe, rapidly worsening, or continues after you sit upright.
Emergency signs include:
Difficulty speaking in full sentences because of breathlessness
Blue, grey, or unusually pale lips or skin
Chest pressure or pain, especially with sweating or nausea
Fainting, severe confusion, or marked drowsiness
Coughing up pink, frothy fluid
Sudden breathlessness with coughing blood or one swollen, painful leg
And for anyone, someone who:
is struggling to breathe, gasping, choking, or cannot get words out
has lips or skin that look pale, blue, grey or blotchy
Other emergency signs, for anyone
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek same-day medical advice for new or worsening breathlessness with leg swelling, rapid weight gain, fever, a fast or irregular heartbeat, or a major drop in your usual activity level.
If you have a heart or lung condition, follow its urgent-care plan.
And for anyone, someone who:
is getting rapidly more short of breath, or has gained several pounds in a few days with swelling
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if the symptom keeps returning, requires more pillows than before, wakes you from sleep, or affects normal activity.
Mention loud snoring, witnessed pauses in breathing, or daytime sleepiness.
And for anyone, someone who:
is more tired or breathless than usual doing things they used to manage
Every sign above is quoted from the sofidex article on Breathing difficulty - lying down. If you are not sure, err upward — it is always reasonable to be checked.