Hello....
Thank you for asking Query
I read it, your child is 4 year ,now a days this problem is more due to intake
of candies ,chips , some sweets frequently taken by children ,specially at meal
time which fade their appetite ,and habit of eating their normal routine meals
gets disturbed, so try to cut these habits ,give child cooked food.as fast food
like sandwiches are not good for heath ,eating simple food cooked in house is good for health,if belly pains,legs/
arm pain looks due to deficient proteins
and calcium in diet as his habit of eating must be changed fresh juice ,a glass of milk daily is essential for good health,for belly pain you can take your son to doctor to do his
stool test routine to see any worms or any infection ,is to be on safe side,but also some multi vitamin syrup he can prescribe for him,Iron syrup if he is Anemia/low red blood.
Hope you got the answer.
Please ask freely any query any time.
Regards,
Doctor M Ibrar