Your son is suffering from Acute gastroenteritis
. Most of these gastroenteritis are due to viral infection and it usually subsides in 4-7 days. Just be watchful for danger signs like decreased oral intake, decreased urinary frequency, altered sensorium, stool mixed with blood or any other obvious symptoms as at times gastroenteritis may be life threatening due to fluid loss.
Give frequent ORS
sips, continue feeding as before illness( can give rice, curd, banana etc, avoid fiber containing diet, cola, sugar containing foods etc).
You can also give
1)Zinc suspension 5 ml OD for 14 days( helps in earlier recovery from diarrhea
1 respule a day for 3 days
I hope this answers your query effectively.
In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out.
Please accept my answer in case you do not have further queries.
Wishing you and your baby good health.