Another thing I didn't say is that I used to engage in anal sex. And after I've finished having sex, my fecal odor problem would become so terrible. I would wash and wash my anal region for days, yet the very terrible smell wouldn't go away until maybe after 2 weeks. But the fecal odor never fully stops; the power of the smell only decreases a bit. So it may be that during anal sex, the rotten, stucked-food were been displaced making them to reveal more of their odor.
Oh by the way, the name of the anti-depressant drug that causes hand tremor but relieves fecal odor is Lamictal. And I actually read about it on poopreport, not here: http://www.poopreport.com/Doctor/knowledgebase/reallysmells.html
I hope the link works. The inability of the body to produce a very powerful dose of Serotonin to empower the digestive nerves could easily result in the clogging of the intestine, especially when water is not consumed at all or regularly.