Don't consult an infant psychotherapist until you talk with your pediatrician or family physician first, experts say. Pediatricians and family physicians can examine your youngster and determine if further evaluation is necessary. If it is required, they can then offer a referral to an infant psychotherapist.

According to the Handbook of Child Psychiatry, some symptoms of psychological disturbance include: Birth to one month: Failure to gain weight; no eye contact; failure to hold up head. 2 to 3 months: failure to thrive; indifference to human voices, faces and play; vomiting and diarrhea without evidence of a physical disease. 4 to 6 months: persistent sleep problems; indifference toward eating; doesn't enjoy upright position. 7 to 9 months: persistent sleep problems; failure to imitate simple vocal sounds or gestures; eating problems (refusing to use hands or hold glass, idiosyncratic food preferences). 10 to 16 months: no words; sleep problem; withdrawn behavior; excessive rocking; night wanderings. 16 to 24 months: no speech; excessive body rocking; no play or story preferences. 25 months to 36 months: disturbed sleep with wild-animal dreams; persistent soiling and wetting or withholding of stool or urine; failure to speak (beyond 18 months); excessive fears of dark, ghosts, burglars; shyness; tics.