Baby’s shallow sleep and easy to wake up may be affected by environmental factors, but also may be caused by the lack of calcium and vitamin D, bedtime fright and other reasons. 1. Environmental factors: the room in which the baby sleeps is too noisy, the temperature is low, the temperature is high, and the light is too strong will affect the baby’s sleep quality and cause the baby to wake up easily in a light sleep. 2. lack of calcium, vitamin D: vitamin D and calcium deficiency will lead to the baby’s nervous system increased excitability, such as irritability, irritability, easy to sleep and easy to wake up symptoms. 3. Frightened before bedtime: Watching a scary or violent video to your baby before bedtime will cause your baby to fall asleep with fear, causing your baby to be overly alert during sleep, leading to shallow sleep and easy to wake up. Baby sleep shallow easy to wake up also with digestive diseases, teething, separation anxiety and other factors, found that the baby sleep shallow easy to wake up should be timely to take the baby to the hospital, clear cause and then give targeted treatment.