Thanks for your query.
is mostly viral in nature and takes few days to subside.
Most important is to maintain hydration.
Give oral rehydration solution sip by sip after each loose stool
,give coconut water,lemonade,
Give lactobaccilus sachet for 2 to 3 days.
Watch for signs of dehydration
like decreased urine output/lethargy/refusal of feeds and in case you find any get him evaluated by pediatrician
Wishing your baby good health.