This topic is about an unexpected experience someone had after a PET scan, which involved a sudden urge to pass mucus through the anus and a blow-out of their colostomy bag. This person is seeking advice and wondering if others have had similar experiences. Here are some helpful insights and advice:

- It's quite common for people with a colostomy to experience anal mucus discharge if the rectum or rectal stump is still present. This is because the unused part of the colon continues to produce mucus, which needs to be expelled from time to time.

- The radioactive isotopes used in PET scans, often combined with a sugar molecule, can sometimes stimulate the gastrointestinal tract. This might explain both the unexpected mucus discharge and the colostomy bag blow-out. Some people report feeling a warm sensation or increased bowel movements after such scans.

- Generally, passing mucus is harmless. However, if you notice pain, bleeding, or an increase in frequency, it might be worth looking into "Diversion Proctitis," which is inflammation of the rectal stump. In such cases, consulting a gastrointestinal specialist is advisable.

- Here are some practical tips from others who have experienced similar issues:
1. Use a Squatty Potty or a similar foot-stool to help with rectal emptying when you feel the urge.
2. If the mucus discharge becomes bothersome, you might find relief with occasional glycerin suppositories or a lukewarm water enema while showering.
3. To prevent future colostomy bag blow-outs, try to empty the pouch frequently, limit food and fluid intake before going out, and consider taking loperamide (Imodium) as a preventive measure when suitable.