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
Get emergency help if bladder symptoms begin suddenly with:
New weakness or numbness in one or both legs
Numbness around the buttocks, genitals, or inner thighs
New loss of bowel control
Inability to pass urine with increasing lower abdominal pain
This combination can indicate serious pressure on the nerves at the base of the spine.
Sudden bladder loss accompanied by facial drooping, arm weakness, speech difficulty, or confusion also needs emergency assessment.
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 medical advice for visible blood in the urine, pain or burning during urination, fever with urinary symptoms, or new severe pelvic or back pain.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if leakage, urgency, or frequent urination is new, persistent, worsening, or affecting sleep and daily activities.
Assessment is also appropriate if you have trouble emptying your bladder, repeated urinary infections, pelvic pressure, or side effects from treatment.
Every sign above is quoted from the sofidex article on Incontinence/oab. If you are not sure, err upward — it is always reasonable to be checked.