For about a week now I have had some discomfort, but not really pain, at the very tip of the penis. At first there was a burning sensation for about 15 minutes, and then it subsided into a kind of slight discomfort, as if it might hurt ot unirate, but it does not So, now it is not 100% right, and I have the impression that there is a dysfunction or a slight infection.

It started about a week ago when I was in the shower and soaping the rectal area and cleaning up this area and the genitals and taking a full shower. This has occurred before at a lesser intensity, but only a few times in my 58 years, and for only a few seconds or minutes.

There is no burning at the tip of the penis now, and there is no other problem anywhere else (in the shaft, scrotum, prostrate lower back ---none) as I have read in some of the other web sites. And, my usual prostrate PSA readings are 1-2.

I have been doing a lot of exercise lately and 10 minutes of bicycling in the gym per day.
Could this have triggred some type of dysfunction?

Or could this be a slight infection or simply a passing discomfort. Most of the day there is really nothing, but it does not seem be a 100% either or back to normal.

I would appreciate your comments.

It could be an infection, an irritation of the Urethra, or any number of other possibilities. You say that you do not have an urge to urinate frequently, and aren't reporting any issues with urination, so it points, in my layman's opinion, to an irritation rather than an infection.

However, you should get this checked out by your Physician to ensure it is nothing else which may require medication or further examination.