Baby’s poor sleep and easy to wake up is considered to be due to sleep environment discomfort, vitamin D deficiency, parasitic infections and so on. 1. Sleep environment discomfort: the baby in the environment is too noisy or temperature is too high, can affect the baby sleep, resulting in poor sleep, easy to wake up. 2. Vitamin D deficiency: Breast milk contains low levels of vitamin D. If a baby is breastfed, it can be triggered by insufficient intake of vitamin D, leading to vitamin D deficiency, resulting in babies crying, restless sleep, waking up easily at night and other symptoms, which can be accompanied by increased sweating and other phenomena. 3. Parasitic infections: If the baby is infected with pinworms and other parasites, pinworms can cause perianal and perineal itching, and the symptoms are aggravated at night, resulting in restless sleep, easy to wake up at night, teeth grinding and other phenomena. In addition, fever, indigestion, etc. can also cause the baby sleep bad easy to wake up, it is recommended that the parents of the child to take the child to the hospital in a timely manner, to rule out physiological factors, in accordance with the doctor’s instructions standardized treatment.