It is best to introduce one food at a time for three to five days. That will help you determine which foods are causing a reaction. In this case since baby is six months old it is probably just the system getting used to the food. Discuss fluid intake with your doctor as well.

try to introduce any fruit or veggie one at a time. continue giving it for at least 3-4 days. then u would know for sure. and once the baby starts any new food. there ought to be changes in his stool. so don't worry it's pretty normal. but if ur baby seems very uncomfortable or in pain because of it please consult a doctor. but pls try and introduce one thing at a time.

Banana may cause constipation