a post I made a few months ago,
link
I couldn't find any reliable information then and I can't find any reliable information now.
I think the answer to all of those questions is fairly simple. If you notice your glider acting strangely or if you notice anything out of the ordinary, then take the glider to the vet. Different illnesses can show the same symptoms, and I think a vet should be the person to diagnose.
I haven't seen any mention of a bacterial infections in the context of the pouch. Bacterial infections do occur and are treated with antibiotics, but I haven't seen any mention of symptoms manifesting with regard to the pouch. My not finding any mention doesn't mean it doesn't exits, only that I don't know the answer. For yeast infections one can find references of it with regard to pouches.
I've searched and could not find any recorded case a female self mutilating due to a yeast infection. What I did find is the assumption that it may happen, not that it has. I don't know what that assumption is based on, as I don't know if a yeast infection is painful or not. I've seen mention of a test that can be used to determine pouch infections, but I'm hesitant to repeat that here as I don't know if the usage of the test is simply hearsay or assumption based on human diagnosis or if it's actually used. I've looked through the Merck site regarding yeast infections and the often stated afore test for diagnosing glider yeast infections is not mentioned at all for any of the diagnoses for other animals discussed.
I think this is a situation where obtaining information directly from a vet and not through Google or sugar glider websites will be necessary.