I have noticed a rash like redness on my penis for about 2 months now. I have no sores, have been tested for stds and came back negative. The glans on the tip of my penis are swollen, and the tip itself is swollen with a bit of swelling on the underside near the tip. I was just diagnosed with mono, I was wondering if these symptoms I am experiencing on my penis could be caused by the mono or something else? I have asked my urologist and general physician about the redness down there and neither have an answer. Note there is not real itching, just more of an irritation/burning.