I am currently deployed, no sexual activity for months, however during my shower I noticed a reddish/white/purplish circular blemish on the side of my penis, maybe 1/4 in diameter midway up the length. It s causing me to panic. It is not raised nor sensitive to the touch. It doesn t appear to have any fluid inside of it and it is easily distinguishable. The previous night I had attempted to masturbate, and I had no lubrication, and due to the environment I was running through my boxer briefs in a circular motion for several minutes. Could that have caused this or is it more serious?