I have a red like rash on my foreskin. Now, actually my penis has a frenulum attached to the penis head. Which is the reason i cannot retract my foreskin fully back. But past few days i noticed there is a red spot on frenulum , or the frenulum appears to be swollen, i am not sure. But it burns a lot when i pee, and sometimes it itches badly in that region. Please suggest what do i do?