What is the definition or description of: excessive crying?

> 1-3 hrs/day: Infants normally cry a total of 1 - 3 hours a day. It is perfectly normal for an infant to cry in an attempt to communicate hunger, thirst, discomfort, tiredness, or loneliness. It is also normal for a baby to have a fussy period in the evening. However, if an infant cries too often it may suggest a disorder that requires treatment.

One hour or longer: Some pediatricians recommend that you let your baby cry himself to sleep. It is important to check on your baby to make sure that he is not in a compromised situation. After a time you will be able to recognize your infants cry be he hungry, dirty, overtired or in distress for some other reason.