many thanks for the opinion.
from the history of your child looks like two things
1.pain
epigastrium.
2.
constipation.
this needs physical examination ear,nose and throat for any infection.if there is no there is no tonsilitis to
pharyngitis,then there is small chance of
acute gastritis or
hyperacidity.this can be rule out by H.pylori test,either stool test for it and same time stool for ova and parasites.
if he is constipated then he needs good hydration with liquids.
-avoid junk foods,chips and cheetu etc
-avoid pepsi ,cola,chocolates and candy.
-avoid banana and potato.
-avoid too much milk and its products.
if problems is not solved with dietary manipulation then needs full investigations.