hold it in or hold it inside

[brend10]

Then she couldn't hold it in/ inside for much longer and she started to tell the story.

If I use hold up... is this make differences..

she couldn't hold up in her for much longer....

what is the differences hold up and hold in ?

[Anglika]

"She could not hold it in any longer" =she could not keep it to herself any longer


"She could not hold up the line of traffic any more". = she could not delay the traffic