Thank you for your query on Healthcare Magic.
Your child is having gastroenteritis
The main part of the treatment is to maintain hydration of the child.
Give sips of oral rehydration fluids like Pedialyte, coconut water, lemon water to prevent dehydration
Monitor his hydration status by his activity, urine output, and skin turgor.
and zinc can be added to his treatment after consulting the doctor.
Therefore I advise you to consult the Pediatrician
for the assessment of the child and for medication advise.
Hope I have answered your query.