If an elderly person has an enlarged prostate and cannot urinate, they need to go to the hospital for further examination. Generally, if the residual urine inside the bladder is >100 ml, an emergency indwelling catheter is needed. If the volume of the prostate is more than three times the normal prostate volume, surgery is generally recommended. The actual fact is that you can find a lot of people who have a lot of money to spend on their own.