Mommies, help ? Daughter 1.5 years old, watery stool for a week, docto…

Mommies, help ? Daughter 1.5 years old, watery stool for a week, doctor on the site stupid knows nothing, and in the infectious disease hospital doesn't want to go, the daughter is very active, eats, drinks a lot, but also pulls it into her mouth too, what I see is in the mouth... maybe someone has encountered, please tell me what can be done to help the child?