1、大脑皮层抑制功能差
婴幼儿的大脑皮层抑制功能较差。在他们入眠后，大脑的某个区域可因一些因素（如睡前过度嬉戏打闹；受到惊吓；刚进入陌生环境等）仍保护兴奋状态。在这种情况下，宝宝就容易从浅睡眠中惊醒，有时还因此而产生夜惊和遗尿现象。
Infants less cortical inhibition function. After they sleep, certain areas of the brain may be due to a number of factors (such as bedtime excessive play slapstick; frightened; just entering unfamiliar environment, etc.) are still excited state protection. In this case, it is easy to wake up the baby from light sleep, sometimes resulting phenomenon of night terrors and enuresis.
2、夜间进食
8个月以后的宝宝一般不需要在夜间喂食了。但有些父母以为孩子夜里哭闹一定是饥饿难忍，于是忙着喂奶、喂水。结果等宝宝再次睡着后，他/她的消化系统却不得不开始“加夜班”，引起副产品--排尿增多，这使得宝宝再次从睡眠中醒过来。
Eight months after the baby is feeding at night generally do not need it. But some parents think the child crying at night must be hungry, so busy feeding, watering. After the results of the baby to fall asleep again, his / her digestive system had to start "night shift", causing byproducts - increased urination, which makes the baby woke up from sleep again.
3、不良应答
有些父母在宝宝每次惊醒后，都立即又摇又抱；甚至陪着他玩、陪着他睡，以这些方式哄孩子入睡。反复多次后，给宝宝建立了不良的条件反射，每次醒来后都渴望有同样的“待遇”；一旦不能得到满足，就觉得特别委屈而大哭大闹不止。
Some parents woke up after each baby, both immediately and shake and hold; even play with him, slept with him in these ways to coax children to sleep. After repeatedly, bad for the baby to establish a conditioned reflex, each eager to wake up the same "treatment"; once can not be met, I felt particularly aggrieved and wailed beyond.
4、困难型气质
属困难型气质的宝宝较难建立正常的吃、睡和排泄的生物切律。常常在无饥饿、尿布干爽或无疾病，甚至在细心照料下仍会无端哭闹，使父母常感束手无措。
The baby is a difficult temperament is more difficult to establish normal eating, sleeping and excretion of bio-cut law. Often in the absence of hunger, dry diapers or no disease, even in the carefully tended still crying for no reason, so that parents know what often feel flawless.
5、疾病
有些疾病是不让宝宝好好睡觉的罪魁祸首，其中较常见有佝偻病（欲称“缺钙”）。这是一种因维生素D缺乏，引起骨骼生长发育异常的疾病。此外，这种病还可导致神经、肌肉的兴奋性发生改变，出现夜惊、多汗及其他一些症状。
Some diseases are not to blame the baby slept, one of the more common with rickets (For called "calcium"). This is due to vitamin D deficiency is a cause of abnormal bone growth disorders. In addition, the disease can also cause nerve and muscle excitability changes, night terrors occur, sweating and some other symptoms.

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