Not able to urinate

Patient: I am unable to urinate, when I try, my penis just goes hard and fills with urine but nothing at all comes out. What is this?

Doctor: Hi.Thanks for your query.This is highly difficult that you are not passing urine at all.If this is of a recent o rigin, it indicates that a stone is impacted somewhere in the urethra.I would advise you the following:Rush to ER.Get clinically examined and investigated by X-ray and ultrasonography.You need an urgent treatment for inability to pass urine with penis filling with urine and getting hard.I hope this answer helps you to get an early diagnosis and treatment