For the last week or so now I have had a very slight, high-frequency vibrating sensation in my penis (it feels like it is in my urethra, from about the base of the glans to the base of the penis). It feels like varying degrees of the following sensations: - a cellphone vibrating in my pocket - a stream of fluid flowing through the urethra (without the sensation of exiting the glans) It is not usually constant, but is rhythmic, that is, will come and go in intervals... much like a pulse or breathing, but it does not coincide with either. The rhythm varies, sometimes 1 second on and 1 second off; sometimes a few seconds of vibrations and a few second of stillness, and sometimes the vibrations are more constant, with slight variances in intensity (though always low intensity). It is neither painful nor pleasurable but is annoying. It is not associated with any other symptoms whatsoever: no discharges or skin, urine, or semen discolorations; no changes in consistency of urine, semen, or stool; no direct decrease in sexual function, although I am concerned that my worrying about it will decrease my ability to perform. The sensation is so slight that it is not noticeable when I am occupied with other activities, but it consumes me when I am still. STDs are unlikely, as both my wife and I have never had any sexual partners other than each other. I have experinced no trauma to my penis, groin, or other structures that I am aware of. I am 30 years old, with no history of medical issues at all... no UTI, STD, PNE, nothing.