, you're right. Not drinking enough will lead to dehydration, which means, yes, less peeing, but that's not a good thing, as you pointed out. We're supposed to urinate a fair amount during the day to maintain optimal health.
Still, choosing not to drink too much before a major event or outing (so as to avoid accidents) *may* be okay, as long as a person doesn't go too long without hydrating properly.
Best, Erin, MultipleSclerosis.net Team Member.