Some juice package carry the warning "do not eat/drink if package is swollen . "why are we warned not to eat/drink the food or juice ? kindly explain?

The reason behind the swollen juice packages is not because they are overfilled with juice, but because there is bacteria growing inside. The sides of the packaging are swollen because the microorganisms that are multiplying inside the juice emit carbon dioxide, which pushes out the sides of the packaging. The warning is thus to ensure that the consumers don't drink the bacteria in the juice.