Anyone else have problems with swelling in the anal canal

Could it be too much lube injected dikuting stool excrements?

Almost like the Aneros has left my anal canal swollen, so that when I go #2 for a fair amount of time after, it ends up looking pencil thin, or ribbonlike. Sorry for the graphic content, and thanks in advance.

Long sessions, especially if you're new to this, can leave your anus mildly to even moderately sore and/or irritated inside which in turn could lead to mild anal spasm, that is anal tightness, when you defecate, thus giving you the long ribbon like soft stools. If you're young, there should be nothing medically wrong and things should clear with allowing extra time for rest between sessions but if you're an older guy, it's smart to get a good prostate and rectal exam from your doctor and even consider having a routine screening colonoscopy to be sure your colon is healthy throughout.