Tip of penis closed and red and now blisters on shaft

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[](https://)the tip of my penis has been red and closed for some months now. i went to the doctor and they said i had balanitis theyve give me cream after cream and nothing works two creams gave me a rash and i got a blister on the tip of my penis. i used petroleum jelly to heal it. i went back to the doctor and all he said was that if it doesn't get worse leave it like that. now im getting tiny blisters on my shaft under my foreskin. theyll go away in like 2 days by using Neosporin but that kinda irritated my skin so now im using curoxen and it works but whats causing the blisters? ive also noticed after sex or masterbation my penis head is kinda red but theres no pain at all. My girlfriend is also clean and has no symptoms of anything

look like herpes

but it didnt leave a scare or a big cut they dried up and healed. looks normal now doesnt herpes cause a bigger rash?

you can confirm by doing blood tests for herpes