Hello dear,
The symptom of
nausea when fed with the formula milk indicates:
1. The digestive system of the child is not strong enough as she is just 5 months old.
2. Presence of
allergy to the formula feeds.
The allergy can either be due to milk or any of the constituent present in the formula feed.
3. Any infection in the Gastrointestinal tract.
If it is due to milk allergy(known as
Lactose intolerance), then investigations like Stool acidity test & Stool
glucose chromatography will be helpful in clinching the diagnosis.
However, if any infective cause is detected, then it has to be managed accordingly.
So, it will be better to
consult a Pediatrician & get a proper clinical examination done to rule out other causes.
Wishing your child a good health.
Take care.