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 for sudden shortness of breath, chest pain, coughing up blood, fainting, or severe weakness.
These can be signs of a blood clot in the lungs or another serious problem.
Sudden facial drooping, arm weakness, difficulty speaking, or a new severe neurological symptom also requires emergency care.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
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 has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek urgent same-day advice if you have:
A painful, warm, or newly swollen leg
Much less urine than usual
Rapidly worsening swelling
Fever or signs of infection while taking immune-suppressing treatment
Ongoing vomiting or diarrhoea that could cause dehydration
3
Does any of this apply?
Book an appointment
Arrange routine medical follow-up if you notice new or increasing swelling, persistent foamy urine, unexpected weight gain, higher home blood pressure readings, or possible medicine side effects.
These changes may need testing but are not usually emergencies.
Every sign above is quoted from the sofidex article on Membranous nephropathy. If you are not sure, err upward — it is always reasonable to be checked.