Frequent night waking of 8-month-old babies can be seen in physiological phenomena, pathological conditions (such as febrile illnesses, vitamin D deficiency, etc.), the specific need to judge according to the baby’s condition. 1. Physiological phenomenon: for this age group of babies, milk teeth are gradually erupting, the above phenomenon can occur, may be accompanied by salivation (drooling), easy to cry, etc., or night feeding is not enough, the baby appeared to be obviously hungry, may also occur frequently waking up at night, can be relieved by increasing the feedings, belong to the normal physiological phenomenon, can be closely observed. 2. Pathologic conditions: (1) febrile diseases: such as toddler emergency rash, often caused by human herpes virus infection, may appear at night fever, making the baby feel uncomfortable, frequent night waking. (2) vitamin D deficiency: for this age group of babies can appear increased neural excitability, such as increased sweating, scalp stimulation to produce discomfort, with irritable, crying, etc., frequent night waking phenomenon, some may be accompanied by square skull and other skeletal changes. 8 months old baby frequent night waking up may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.