usually not due to herpes.
what about very sensitive penis heaD?
I removed your other post since it's a duplicate. please read our read before posting post on this forum as to the rules of posting here. thank you.
if you had contracted genital herpes through oral sex back in june, odds are you would've had obvious symptoms closer to that time. A painful erection is not a sign of herpes. see your provider for a proper work up if this continues.
grace