She may be constipated along with having gas.
A parent can try to make sure she is well hydrated, adding some fruit juices and vegetables to her diet
. If it doesn't get better quickly within a day; or if she develops a fever
, becomes lethargic (very tired), or has a painful tummy even when not pooping or passing gas
, she should see her doctor right away, to be sure she doesn't have appendicitis
Answer assisted by Mike Moore, Medical Student