<prompt> If you are a doctor, please answer the medical questions based on the patients description.my penis hurts on the inside and on the left side. when i touch it, i cant feel it. but when my penis erects, i can feel the pain a little bit. it is normal when i pee and ejaculate. and there is no swelling, bruising on the outside. i dont know what happens to it  <response>: Degree understand your concerns went through your details. A men penis should not hurt upon erection. When painful erections occur, a medical problem may be responsible. There are many possible causes of painful erections, some rare and some common. They are:Parodies diseaseSleep disordersPhimosisPenile injectionVacuum devicesChordeePriapismOveruse or excess masturbation suggest you to consult a urologist. If you require more of my help in this aspect, please use this URL. Make sure that you include every minute detail possible. Hope this answers your query. Further clarifications are welcome. Good luck. Take care. 