Thank you for your query,
Your child seems having Gastroenteritis
due to bacterial or protozoal organisms like giardia or entameba.
His stool should be given for complete stool examination to look for pus cells and to look for giardia or cysts and for culture and sensitivity to look for any bacterial growth
and for sensitive antibiotic.
Give sips of oral rehydrating solutions to prevent dehydration
and consult your Pediatrician
for further specific management.