I weighed myself last night and I weighed 145, I weighed myself this morning and I weigh 141. What happened?

Question

I’m a 26 y/o man. 5’7 and I have a very high metabolism. I’m sick and tired of looking like a little boy so I’m trying to gain some muscle mass. I’m constantly eating and working out but I’ve only went from 136 to 145, but now I’m at 141. 

Answer 1

It could be water weight. Did you urinate a lot during that time period?

Answer 2

Did you take a dump?

Answer 3

my weight @ 11 yrs old was 106---@ 20 yrs old 164.........

... at 42 was 193    now I am at 164 (again 50 yrs later)

Answer 4

Lol, any person's weight can fluctuate up to 10 pounds per day, easily. This is the continuum of the changing human body. 

If you peed (and/or pooped) first thing in the morning before you weighed yourself, and after your food was digested (burned off/utilized by your body) all night, that's where the 4 pounds went. Weigh yourself at the end of the day again after eating well and drinking a ton of water -- I can almost promise you that you will see that 145 again.

Answer 5

It's probably just water weight.

Answer 6

you lost water weight

Answer 7

Shifting weight on scales pushes down differently, y didn't lose weight during sleep unless you went to the bathroom and peed. That would be only about a pound worth. 

Answer 8

You have cancer.

Answer 9

We all loose weight overnight.

Answer 10

You tend to lose weight overnight because of dehydration.