Occassionally, I have seen a small bump in the shaft of my penis. The bump seems to be benign, if touched, may trigger itching, and it seems to have pus cells within (in liquid or solid state).
When I press it (I know I shouldn't), the pus comes out and the bump seems to go away faster than when I don't touch.
Query: Is it normal to have such bumps in penis shaft occassionally?
PS.: I have done intercourse with only my wife, and this issue persisted from long before I have engaged with my wife. So, this rules out any STIs.