bump on my pennis

Men's health
1

Hi  guys,

I have been having this on and off for about 4 months now , i have been to the doctor and have been treated for STD, some times i wake up and am bump free and sometimes it just there , 

i have also tried topical and it works but when on prolong use i get burns 

2

Been going through post on this forum and I am starting to think it is psoriasis.