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No, that would not be routine for a routine physical examination. The only time we really insert a catheter in the patient is to determine whether or not you are emptying the bladder completely or not. If this is why you're being seen, then yes, this would be a routine. Hope this helps.
Why are they injecting your penis and scrotum? What are they going to inject?
If you can find out more information, I can help you. Without knowing what they're going to inject into you and why, I can't really help much.
I have never heard of need to inject the penis or the scrotum in this manner.