Infants instinctively cry to communicate hunger, thirst, discomfort, tiredness, or loneliness. However, excessive crying may suggest a disorder that requires treatment.
Review Date 11/12/2012
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.