Thank you for your query on Healthcare Magic.
Your child seems to have a viral fever
as you told the liver function tests are high.
But the other infections like sinus infection
, typhoid fever
, urine infection, malaria
are to be ruled out by doing blood and urine investigations for them.
Maintain his hydration by giving plenty of oral fluids.
I advise you to follow the treating doctor advise and discuss with him of your concerns.
The stomach pain, headache may be due to the infection and can be treated by your doctor.
Nothing to worry and the the doctor will look into your child problems and he will take care of the problems.
Hope I have answered your query