Six and a half month baby frequent night waking, can be physiological phenomena, pathological conditions (such as vitamin D deficiency, eczema), need to be analyzed according to the baby’s situation. 1. Physiological phenomena (1) For babies in this age group, the above performance can occur when the milk teeth erupt, which can be accompanied by easy crying and increased salivation (drooling), usually in good general condition, without other abnormal symptoms, such as fever, cough, etc., which is a normal physiological phenomenon, and can be closely observed. (2) The baby sleeps at night in a higher temperature or drier environment, which makes the baby feel uncomfortable and may cause frequent waking up at night. It is necessary to pay attention to adjusting the environmental temperature and humidity, and reduce the blanket as appropriate to alleviate the problem. 2. Pathological conditions (1) Vitamin D deficiency: such as affective vitamin D deficiency rickets, in the early stage of the disease, there may be increased sweating, irritability, which may affect the night sleep, the above phenomenon, may be accompanied by cranial softening and other skeletal changes. (2) eczema: such as more serious eczema, can make the baby produce obvious itchiness and other discomforts, affecting sleep, frequent night waking. Six-and-a-half-month-old babies often wake up at night, there may also be 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.