Children with little sleep have no serious harm in a short time, but if long-term sleep deprivation may lead to memory loss, affect growth and development, easy to myopia, and affect learning. 1. Memory loss: hippocampus is an important structure in the brain to consolidate memory, and reduced sleep time will damage the plasticity and function of hippocampal neurons, leading to memory loss. 2. Impact on growth and development: prolonged and severe sleep deprivation will cause the secretion of growth hormone, resulting in children’s growth and development being affected, and in serious cases, children’s height may be affected. 3. Easy myopia: prolonged sleep deprivation may also cause eye sympathetic and parasympathetic nerve dysfunction, inducing myopia. 4. Impact on learning: sleep less time at night, resulting in daytime spirit, attention in class is not focused, in the long run will affect the children’s academic performance. Parents are advised to arrange children’s study time reasonably and ensure that children get enough sleep to prevent the above mentioned symptoms from occurring. If the child is not feeling well, it is recommended that he or she seek medical attention in time to avoid delaying his or her condition.