Thank you for your query.
Loss of appetite and retching
may suggest an upper GI problem. Kindly get the following investigations:
1. Urine for bile salts and pigments.
2. Stool routine examination.
function test, if required.
We also need to exclude a hepatic cause for these symptoms.
I hope I have answered your query to your satisfaction.
Wishing your daughter an early recovery.
Rajiv K Khandelwal