I have a bit off a problem, at 3pm I noticed a red sore looking thing on my penis, about the index finger nail in size, and swollen, I had intercourse 8 months ago and it s showing up now. But did masturbate at 12 and noticed it when had to use the washroom It s mostly painless (gets irritated if underwear rubs it enough though) doesn t itch or feel like anything and isn t sensitive, but it s mostly concerning since I fear it may be herpes of the such, I looked all over and can t find the name, I d like to know if I should be fine, I m new to this site but if possible ask me questions for more details I may have missed.