Babies wake up easily may be due to mental stress, environmental discomfort, calcium deficiency, rickets and other factors. 1. mental tension: baby watching more horror or more thrilling TV series or cartoons, easy to make the baby’s mental state of tension, can not be effectively relieved in the sleep and wake up. 2. environmental discomfort: baby sleep in the environment of loud noise or room temperature is too high so that the baby wakes up easily. 2. environmental discomfort: when the baby falls asleep, the environment in which there is a large noise or room temperature is too high to make the baby feel uncomfortable, will also make the baby wake up. 3. calcium deficiency: calcium is a good source of calcium. 3. lack of calcium: calcium is the baby’s growth and development of essential nutrients, the baby intake of calcium content is insufficient, easy to growth and development retardation, muscle twitching, convulsions and other phenomena. 4. Rickets: the baby’s body vitamin D content is seriously insufficient can trigger rickets, manifested as sleep easy to wake up, easy to cry at night, etc., so the baby lack of vitamin D may sleep easy to wake up the situation. If the baby wakes up more often when sleeping, it is recommended to take the baby to the hospital to check the cause of the disease, early treatment, to avoid delaying the condition.