Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for severe bleeding with weakness or fainting, chest pain, severe shortness of breath, or sudden confusion.
Seek prompt medical advice if you develop a fever, worsening pain, cloudy or foul-smelling urine, or increasing bleeding.
Get urgent help if you cannot pass urine, the catheter stops draining with increasing bladder pain, or you pass large clots or persistent bright-red blood.
For routine questions, contact your team if burning, urgency, leakage, or difficulty urinating is not improving as expected.
Also call if blood in the urine repeatedly returns after activity or you are unsure when to restart medicines.
Every sign above is quoted from the sofidex article on Transurethral resection of the prostate. If you are not sure, err upward — it is always reasonable to be checked.