Hi Doctor, I'm 21yo And Since A Few Month Developped

Hi Doctor,
I'm 21yo and since a few month developped irritation on my penis (glan area), I've tried many lotion like Lamisil or clotrimaderm as doctors told me to do. After a few weeks of treatment no amelioration visible. I recently purchased the 1man 1 oil lotion and started applying it every day. I have seen a light improvement but my glan turns red as soon as there is friction (not even talking about masturbation)... Any idea how I could beat that problem ?

Thank you
PS : Sorry for the bad english, it's not my native language