the pain most probably may be due to intestinal colic
In this age round worm infestation is quite common giving rise to pain,malnutrition
leading to weakness,lethargy
X-ray will not show any thing usually
please get a check up with pediatrician
and take treatment .
1 tab 2 times daily for 3 day may be given
Fpt pain antispasmodics like decoloic may be given ,1/2 tab may be given ,
HOPE YOUR BOY BECOME WELL SOON .