Remember, bottle fed children do not have bowel movements as frequently as breast fed children, so the number of times your child has a bowel movement is not alone an indicator. Usually, constipation is a concern if the stools are very hard and small like deer stools or causing pain or bleeding. Always wash hands after diaper changes or, once your child is potty trained, when done helping him get clean after using the toilet. Teach this lesson to your child as well. If your child is a newborn or young baby, discuss this with your pediatrician first.
Diarrhea causes dehydration.
Again, check this out with your pediatrician for her specific preferences. Diarrhea can also cause a nasty bout of diaper rash. Keep plenty of diaper rash ointment on hand for these occasions. There is little worse than having the runs and a diaper rash all at once. This could cause digestive problems.