Many men as we pass the age of 50 are likely to have to deal with the problem of prostate enlargement. In fact literature I have read, indicates that it is all but inevitable, so, if you are past 50 and are having any troubles urinating, or start to have to urinate frequently, go see your doctor.
If you are catheterised you can go to these two sites for good information:
I pass these on, as doctors and or nurses don't always tell you every thing you need to know.
Some additional hints for men:
Trim the pubic hair. This will remove one source of irritation.
Apply hand conditioner to the corona (i.e. immediately behind the glans)the portion where it connects to the the shaft. (this will help prevent itching in circumcised men)
Apply KY jelly to the meatus.
Keep the penis and the tube as clean as possible. This will help prevent infection.