Thank you for your query.
As you son is having loose motions it means that he is having an intestinal infection and fever
is the other presentation. You need to take care of:
1. Feeding hygiene.
2. Plenty of oral fluids to prevent dehydration
every 4 hour to reduce the fever if the temperature is above 99F by side.
4. Medicines for diarrhoea
as advised by the doctor.
The doses of the medicines shall depend on the age and weight of your son.
I hope I have responded to your query to your satisfaction.
Wishing your son an early recovery.