@markharris For both the urinary and rectal issues, hyperbaric oxygen therapy (HBOT) can often be effective.

Most men who have these problems - radiation-inducted cystitis, proctitis, or enteritis - don’t understand they may have the HBOT option (depending on their insurance and access). Request it and see if you can be approved.

The doctor may want to do a cystoscopy first - often you have to have a “documented diagnosis” of cystitis; whatever hoops to jump through to get approved for HBOT, do it.

There would be multiple sessions; HBOT enhances the wound-healing process; it may help; it certainly wouldn’t hurt. And that’s not a bad deal when you’re dealing with a chronic radiation-induced problem.