Just like your blood pressure, it rises n drops throughout the day. Could be lbs being shed but by the next day, you gain it all back. I'm thinner after I poop it out.
Could be your pants being stretched. Could be all in your head. I'm 20lbs over weight but I can't see where that 20 lbs being distributed throughout my body. Maybe 10 lbs for my belly as I'm 3 months pregnant they say but what about the other 10?
Maybe 2lbs for my azz cheeks.
Could be you losing fat in your azz cuz I know Hmong women can have a flat azz.