you dint mentioned about her diet and any constipation issues,.
i mean clear history is missing to tell the exact reason for her sufferings.
is the pain coming after food intake or food intake
It Might Be REFLUX or Gas Bloatedness which make your intercostal muscles cramping.
Try to Have luke warm water when ever she want to have water min 3 litres /day
Take Guava,papaya,Pomegranate fruit in empty stomach.
Take Nexpro Rd 40 mg once a day in early mornings in empty stomach.
if wont subsides Do A USG WHOLE ABDOMEN SCAN to look for any gall stones...
early bed time meal 3 hours gap to be maintained For sleep