Thanks for writing to health care magic.
White stools with loss of appetite the first thing that comes to my mind is if your child is having jaundice
Are his eyes yellow in color?
Does he have any vomiting?
Is the pain abdomen more on the right side beneath the ribs?
What is the color of his urine?
A physical examination by your doctor followed by liver
function tests including serum bilirubin
will help in arriving at a diagnosis.
Hope this helps.