hi,did you have protected sex or unprotected,and was it someone you know like your girlfriend or was it a prostitute.I had that problem when i was having sex with my wife for too long and it ws also burning like for a day or two,but then it stopped,how long has it been burning for.
No you can't put anything on it to make it go away. You sir have an std. I advise going to a clinic to get tested. I would also avoid sexual contact with anyone until u are cleared.