I am in my 30's and male. A few weeks ago I noticed that I have a hard
spot in my rectum about 4inches up it, maybe near my prostate. It is
hard and feels like it is under the skin and does not move. Myabe the
siize of a dime or a little smaller.

(I found this through self examination with a lubricated finger.)

It is a couple of inches aboce an internal hemroid I have.

I dont know what I should do. It is not painful. Around October last
year I had a full colonoscopy for something unrelated and they found
nothing wrong.

Is there a chance they missed something?

How would you tell if this is a prostate thing? I guess this is the
other thing that worries me. Since December I have been on
Testosterone gel from the doctor for low normal testosterone. I know
it can cause prostate problems.

Any advice?