Suggest Treatment For Rashes On The Penis And Pain During Urination

For about 3 months now, i have a (don t know for sure if its a rash ) in my penis glans but looks like it. It doesn t hurt at all, like irritation, or it hurts when i pee or burns etc, no pain at all. I want to know how can i remove it. To give more detail on it, it could have happened because i fell asleep just after i masturbated on my underwear. I masturbated because i wasn t able to sleep at all and it quickly made me drowsy and i slept good. And i masturbated on my underwear because i didn t have much privacy to do it in the normal way . Thank you for your time and help.