Why is it you weight 3 pounds more during the day then you do in the morning?

And how come people always say "Always weigh yur self in the morning" ?

We retain water throughout the day.

Oh... I knew that but I never knew that its true... Like.. you can really gain 4 pounds through out the day until you wake up?
Hahah crazy...

You become dehydrated over 8 hours with no fluid intake. Your lowest weight will be first thing in the morning, after a potty visit.

Thank god.. I almost bugged out.. Normally I weigh 130 pounds.. I checked the scale just now It said 133/134.. and I was flipping out until my mom told me its only because I ate and drank some water.

I got a good scare out of that :p