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 or difficulty breathing
Chest pain, especially when breathing in
Coughing up blood
Fainting, severe weakness, or confusion
Uncontrolled bleeding, vomiting blood, or black bowel movements
Sudden severe headache or new weakness on one side while anticoagulated
These symptoms may indicate a pulmonary embolism or serious bleeding.
Do not stop the medicine on your own unless emergency care professionals tell you to do so.
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 prompt same-day medical assessment for new flank pain, visible blood in the urine, a major drop in urine output, or rapidly increasing swelling.
These symptoms have several possible causes and need proper evaluation.
If you are taking an anticoagulant, contact your healthcare team promptly about repeated nosebleeds, unusually heavy menstrual bleeding, increasing bruising, blood in the urine, or blood in bowel movements.
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate for questions about activity, travel, planned dental work, treatment duration, or mild stable bruising.
Every sign above is quoted from the sofidex article on Renal vein thrombosis. If you are not sure, err upward — it is always reasonable to be checked.