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
Seek emergency help for symptoms that could indicate a pulmonary embolism or severe bleeding:
Sudden shortness of breath
Chest pain, especially if worse when breathing in
Coughing up blood
Fainting or severe weakness
Heavy bleeding that does not stop with firm pressure
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
Get urgent medical assessment for new one-sided swelling, warmth, redness, or pain, especially if it begins suddenly.
These symptoms can occur with a DVT.
Fever with rapidly spreading redness, increasing pain, or feeling very unwell may indicate cellulitis and also needs prompt care.
3
Does any of this apply?
Book an appointment
Routine appointments are appropriate for reviewing compression garments, monitoring growth, discussing a stable birthmark, or managing ongoing swelling that has not suddenly changed.
The article also says
Contact your usual care team soon for repeated bleeding, blood in urine or stool, a new wound, persistent fluid leakage, increasing pain, or a noticeable change in limb size or function.
Every sign above is quoted from the sofidex article on Klippel-trenaunay syndrome. If you are not sure, err upward — it is always reasonable to be checked.