What Causes Small Painful Dots On The Penis?

my name is ramesh. Once upon a time i was meat a lady with phisically, after 3 months i was been problem with my pennis. The symptoms are "small spots on my pennis, and painful while urene. Than i went to a doctor, he told me that i feel with VDRL virus. I used so many medicenes but till the problem is not solved. Please tell me the solvation for this problem.