Hello @nwcs, Welcome to Connect. I don't have microscopic colitis but have been battling constipation this past year. What has kept me moving so to speak has been the daily use of Miralax (approved by my doctor). I did find some information from 2015 that I think might explain what is happening.

"There have been rare cases reported of people who had microscopic colitis but had no diarrhea or had constipation instead. In these cases, ..."
-- Microscopic Colitis: https://my.clevelandclinic.org/health/diseases/17227-microscopic-colitis

@oakbourne, @aithnie, @emyliander, @astaingegerdm and others have posted about microscopic colitis and constipation in other discussions and may have some suggestions for you.

Have you made any changes to your diet to see if it might help?

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