What Causes Pain In Penis During Erection?

hi i have a problem in my penis Dr
four months back i rubbed my pennis by using a electrical glouse which is used for electrical red co lour glouse next day i got some bumps in the red area tip of my penis immediately i went to a doctor showed him the area ,he gave me a gel ointment i applied it with in a weak it got cured(i did not inform him i rubbed in the glouse)

after a weak i went to outstation where i need to stay there for 2 months,after two or three days it appeared once again i went to a medical shop and asked an ointment he gave me one ointment i applied it with in a weak i it got ok ,after one weak it appeared once again i went to a local doctor informed the glouse matter he gave me one ointment i applied it my whole penis red skin got pealed and got cured,after this i came back to my place after a weak it appeared once again i went for infection test and scaning
i had no problem in liver and kidney .i met dermatologist he checked my penis and gave me two tablets and two ointment.
(he used surgical glouse to check the next day it got little bulged but got ok) i followed for two weak (in between i went to a ayurvedha treatment he asked to follow some treatement i am following it)after taking this treatements it got ok ,i came out of itching sentation and bumps got disappeared for the past two weaks suddenly (i did self sex hand job) after this again i am getting bumps and itching in the red area and in the skin.
what is my problem what type of infection is this i am not married 32 please give me a right solution (when ever my penis get errected i get a pain in the left side down to the pennis (I do have uti and some times burning sentation in my groins when ever i travel it is more )