If he is having burning pain, the doctor may be able to prescribe some pyridium for him. Turns the urine orange but it relieves pain and burning in the bladder.
CIS is a nasty bugger. I had it back in 2006 and it came back again after a couple of years. Wound up having my bladder out but I attribute part of that to the fact that I failed BCG. Had bad reactions so my doc stopped it.
The BCG could cause inflammation after finishing the first round of treatment. If he had CIS he should be scheduled to get maintenance BCG in six months. BCG is great for CIS but the ongoing maintenance treatments of BCG are very, very important when dealing with CIS.
Also, BCG causes the bladder to do battle with cancer cells. If CIS is coming back (and yes it can come back fast) it could be the BCG causing his bladder to trigger the immune response. That's part of what BCG is supposed to do.
If he does have a recurrence and he isn't already being seen by a bladder cancer specialist at one of the top bladder cancer hospitals then I would STRONGLY recommend a 2nd opinion. He doesn't want to underestimate CIS.
Mike
Age 54
10/31/06 dx CIS (TisG3) non-invasive (at 47)
9/19/08 TURB/TUIP dx Invasive T2G3
10/8/08 RC neobladder(at 49)
2/15/13 T4G3N3M1 distant metastases(at 53)
9/2013 finished chemo -cancer free again
1/2014 ct scan results....distant mets
2/2014 ct result...spread to liver, kidneys, and lymph...