Thanks for the query
It is most likely that the lump in the anus is because of the hemorrhoids.
Pain in the bladder has to be evaluated for with a urine routine. Before a CT scan
I would rather have an ultra sound
abdomen and pelvis done to rule out any tumour, it is a fast and simpler way to rule out a tumour, it can also enlighten us on whats causing the pain in the bladder
I hope I have answered your query