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
Go to an emergency department if you cannot pass urine, especially if you are passing clots or your lower abdomen feels painfully full.
Emergency care is also appropriate for heavy ongoing bleeding, fainting, marked weakness, or blood in the urine after a major injury.
And for anyone, someone who:
is bleeding heavily and it will 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 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
Arrange a prompt medical appointment for any visible blood in your urine, even if it happened once or has stopped.
Seek same-day medical care if bloody urine occurs with:
Fever, chills, vomiting, or feeling significantly unwell
Severe pain in your side, back, abdomen, or groin
Burning urination with worsening pain or frequent urges
Pregnancy or a weakened immune system
3
Does any of this apply?
Book an appointment
You should also book follow-up if a urine test found blood that cannot be explained by menstruation, recent strenuous exercise, or a temporary infection.
Every sign above is quoted from the sofidex article on Urine - bloody. If you are not sure, err upward — it is always reasonable to be checked.