no sleep

hunger

and not going to the bathroom

Pediatricians estimate that 20-30% of children have difficulties with sleep that are serious enough to disturb their families.

The question makes an assuption that is not strictly true. Some may have such problems others will not.

Sleep disorders are a group of syndromes characterized by disturbance in the patient's amount of sleep, quality or timing of sleep, or in behaviors or physiological conditions associated with sleep. There are approximately 70 different sleep disorders that may be the result of serious medical conditions, including breathing difficulties or thyroid disorders, or external factors, such as stress or substance abuse. Manifestations include insomnia, sleep apnea, and narcolepsy.

Sleep disorders are a group of syndromes characterized by disturbance in the patient's amount of sleep, quality or timing of sleep, or in behaviors or physiological conditions associated with sleep. There are approximately 70 different sleep disorders that may be the result of serious medical conditions, including breathing difficulties or thyroid disorders, or external factors, such as stress or substance abuse. Manifestations include insomnia, sleep apnea, and narcolepsy.