Infants and toddlers have clinical manifestations of frequent tossing and shaking their heads repeatedly during sleep due to sleep disorders and other diseases. So how are infants and young children diagnosed at different ages when they frequently flip and shake their heads repeatedly during sleep? The following is a brief introduction. (1) In infancy, infants and toddlers often flip during sleep and repeatedly shake their heads mainly because it is difficult to establish a stable sleep pattern, which is manifested as difficulty in falling asleep and continuous sleep, forming behavioral insomnia. It can last until early childhood or even late childhood. The main reason for this is that the important stage of sleep development in children from 8 to 12 weeks after birth is not given the appropriate attention. The diurnal sleep cycle is not well established and the ability to “masturbate” during the sleep/wake cycle is not developed in the behavioral development. (2) Sleep disturbances, night terrors, somnambulism and somnambulism are more frequent during the early years of 2-3 years. Some studies suggest that night terrors may be due to an intermediate process in which biological factors, environmental factors and the child’s cognitive development interact. Sleep talking and sleep walking disorders are mostly associated with immaturity of the central nervous system. (3) Frequent snoring during sleep, teeth grinding disorder and nightmares are likely to occur between the ages of 4 and 9 years. The reasons for this are related to the physiological growth spurt of lymphoid tissue in the pharynx during this age, the narrowing of the airway for infection, the eruption of permanent teeth instead of milk teeth, and the immature development of the central nervous system during this period. (4) In contrast, sleep deprivation, insomnia and episodic sleeping sickness occur more frequently after the age of 10 years to adolescence. The incidence of insomnia in adolescence is 10-20%, mostly due to environmental influences that disrupt the endogenous rhythmic cycle that regulates the sleep-wake cycle]. Sleep disorders not only cause histological damage to the body organs, but more seriously impair the child’s ability to learn knowledge and behavior. It causes impairment of the child’s emotional cognition and social skills. These suggest that there are clear age-related developmental stages of frequent tossing and turning and repeated head shaking during sleep in infants and children.