Is she in the hospital?

It's usually, but not always, caused by drinking too much alcohol. On rare occasions it can be caused by other things such as abdominal surgery or an accident, or it can just pop up for no known reason.

She'll need a lot of pain medications and she needs to avoid fatty foods and alcohol. Now that she's had it once, she's likely to have it again even if she's careful. It is sometimes dangerous, so if she does have symptoms make sure she goes to the Dr.

Hope I've been of some help.