erection pain

  For the past several months, I have been experiencing pain in my penis when I have an erection. I have no pain when I urinate or ejaculate. I also have no visible signs of any changes in my penis. I only have pain with an erection. What could be the cause?
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Dear Dennis
Thank you for your question.
Painful erections are very uncommon unless you have recently experienced penile trauma.  Long lasting erections can become painful due to the lack of oxygen to the penis because the penis is filled with oxygen deplete venous blood. The condition of an erection which last for more than four hours is called priapism.  Peyronie