### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
My 3-1/2 year old great nephew is always grabbing at his penis. I ask if he has to potty and he says no - my penis hurts. Yesterday I asked and he said it always hurts. I ve glanced at his private area when he s on the potty and nothing appears to be wrong. I know he has detested wearing underwear - including when he was in diapers - from day one. He goes without or discards his underwear whenever he gets a chance and that s perfectly acceptable but I m curious. Dad and mom says he hates his underwear and has always complained about his penis being sore but they too see nothing out of the ordinary. In his early exams, doctors have discovered nothing and given him a clean bill of health. I m 62 years old and have never had children but I babysit him and his sibblings often. Since this concerns me I have to ask if it is a problem male children typically have? The only thing I m aware of is that quite often his bowel movements require a lot of straining but since he has a very healthy diet which includes a lot of apple juice I m guessing that s something that will improve as his system matures.

### output:

Hello, As a doctor has already examined him and finds no problem, I suppose this is related to psychological development of child. At this age of 3_4 years child Chat Doctor.  It's just their normal development. Just observe whether he complaints only while he is idol, or does he complain about it while playing or while pre-occupied with something of his interest. If he complaints only while idol, just do not worry. Disclaimer"This provisional advice provided by me stands subject to the patient undergoing a physical examination and is based entirely on inputs provided by patient/attendants. The patient is advised for physical examination at earliest"