What does it mean to have stool that looks like powder is very loose and smells bad? I've been experiencing this for months now....

Hard to visualize? To describe your stool as looking like powder and being loose is a little confusing...looseness often suggests watery. Perhaps you mean the powder isn't sticking together! My general thought is that your stool is too dry...you are not drinking enough fluids, especially water, or stool is passing very quickly through your intestine so it doesn't absorb. Try increasing water (a lot!). Then, to Doc:)