Infants instinctively cry to communicate hunger, thirst, discomfort, tiredness, or loneliness. However, excessive crying may suggest a disorder that requires treatment.
Review Date 12/9/2016
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.