Nine-month-old babies frequently wake up at night can be seen in physiological phenomena, pathological conditions (such as eczema, etc.), the specific need to analyze and judge according to the baby’s condition. 1. Physiological phenomenon: for nine-month-old babies, milk teeth are erupting in an orderly manner, in the process the baby can appear easy to cry, affecting the night sleep, frequent night awakenings and other phenomena, usually a good mental response, is a normal physiological phenomenon. For babies who are not fed enough before bedtime or at night, it may also affect their sleep and cause the above phenomena, which can be significantly improved after increased feeding. 2. Pathological conditions (1) Eczema: in severe cases, there may be obvious itchiness, accompanied by localized exudation, which may affect the night sleep and cause frequent waking up at night. (2) Gastrointestinal dysfunction: If the digestive tract cannot tolerate more food, bloating and abdominal discomfort may occur, and the baby may experience the above phenomena due to discomfort. Nine-month-old babies waking up frequently at night is recommended to consult a doctor in time, assessed and judged by a specialist, in order to clarify the cause of the disease and standardize the treatment.