Hi. Welcome to the site. I know that obstruction is a rare side effect of BCG therapy. Also, sometimes if you have a TURBT close to the bladder neck, it can cause an obstruction. Do you know if your surgery was performed near the obstruction site? If so, this could be the cause. I'm not sure what can be done about it, but I would think a surgical procedure might be possible to open the passageway to the urethra.
12/2015 - TURBT, non-invasive T1, mixed grade, 3 tumors
1/2016 - Begin BCG weekly for 6 weeks