Thank you for your query.
Your child has viral diarrhea
Avoid milk,fruits,juices and wheat products for the time being.
Give him pro-biotic syrup, zinc and ORS
Apply some emollient
cream to the perianal area.
He should recover in a few days.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.