yo-yo-ing

Godsflower1789

any idea why weight "yo-yos" so-to-speak? I'ev been having issues weighing in because it flutuates so rapidly. And I am aware of sodium intake, but if my sodium is under control... i'm not sure why it is fluctuating so much?
Also- how do you record your weight on mfp when it fluctuates so much (for those who may have this problem also)?