When you get sick why do you lose weight?

when you get sick you sometimes loose weight because when you are sick you loose weight because you don't want to eat or do anything.

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i just recently , got over a sickness and ive lost well ALOT of weight ,

im trying to gain it back , but its hard when you have a high metabalism .

but your body looses weight because when your sick , you dont really have

an appetite to eat anything , and you dont really move around and be active

as much as your normally would , when you arent sick .