Thanks for writing to health care magic.
In a child with GERD vomiting
may occur if the child lies down soon after consuming some thing.
So do not give your child any thing just before sleeping.
Your doctor after complete physical examination will do a lower esophageal Ph monitoring and if required a endoscopy
to confirm the diagnosis.
that your child is having could be a viral infection. If there is pus or blood in the stool then we suspect dysentry
and start the child on antibiotics.
Maintaining hydration is important in a child with diarrhea.
Hope this helps.