I have recently had a burning/tingling sensation in my penis for about a week. I had protected sex once in my life about a year ago. I am 23. I suffer from acne on my body especially on my back. I do not have any pain urinating and my urine is yellowish. My diet consists of a lot of caffeine and fast food. The burning/tingling sensation only seems to happen at night. I don't feel it at all during the day. I also have seemed to find some whitish spots on my penis but I think those are harmless. I don't really itch down in that region to often except for my anal region. What can this be?