It seems that this problem is due to taking American corn
without chewing properly.
You can give Topcef and Colicaid srup and for vomiting Emeset
Give plenty of liquids, water and electrolytes.
Observe for dehydration
and if there is no improvement within a day, consult your doctor and go for treatment.
If dehydration takes place then IV fluids may require.
Ok and take care.