Periods of crying or screaming may begin suddenly, for no apparent reason, and last for hours. Some children may experience fears and anxiety. Other unusual behaviors.
[…] of purposeful hand movements, gait disturbance), and 6 of 11 supportive criteria (impaired sleep, abnormal tone, vasomotor disturbance, scoliosis, growth retardation, and screaming
Abnormal sleep patterns can include irregular sleep times, falling asleep during the day and being awake at night, or waking in the night with crying or screaming.