The baby always tossing and turning in the second half of the night can be seen in physiological phenomena, pathological conditions (such as gastrointestinal dysfunction, etc.), specific need to be analyzed in conjunction with the baby’s specific situation. 1. Physiological phenomenon: if the temperature of the sleeping room is too high or too low at night, making the baby feel uncomfortable, which can be manifested as always tossing and turning in the second half of the night, you can adjust the room temperature or increase (decrease) the blanket. 2. Pathological conditions (1) Gastrointestinal dysfunction: such as improper diet, abdominal distension, abdominal discomfort, which may be accompanied by vomiting and other symptoms, the above manifestations can occur, for constipated babies can also occur. (2) Nutritional vitamin D deficiency rickets: for younger babies, in the early stage of the disease, there can be increased neural excitability, sweating can stimulate the scalp so that babies appear in the latter half of the night sleep insomnia, can be accompanied by cranial softening and other skeletal changes. (3) febrile diseases: such as acute upper respiratory tract infections, night fever symptoms can occur, elevated body temperature so that the baby has a sense of malaise around the body, the above performance. (4) other: such as eczema, the more serious can appear obvious itching, affecting sleep, appear in the second half of the night sleep always tossing and turning phenomenon. It is recommended that babies always tossing and turning in the middle of the night should seek medical advice from a specialist to assess and determine the cause.