Thank you for your query.
It can be a case of gastritis
or a case of mesenteric lymphadenopathy
Give her mucaine
gel and see whether her pain goes away,if it does then it is gastritis.
Get a usg abdomen done to exclude lymphadenopathy or pancreatitis(rare).
For pain give drotin syrup.Avoid ibugesic
Hope this answers your query.
If you have any other queries kindly direct them to me.
Wishing a speedy recovery.
Have a nice day.