Seven months the baby does not urinate at night is usually associated with physiological factors such as drinking less water, sweating more, as well as pathological factors such as fever, diarrhea. 1. Physiological factors: if the seven-month-old baby during the day to drink less milk, not much water or the baby love sweating and so on may lead to the case of the night does not urinate, this is a normal physiological phenomenon, the baby’s mental state as well as the growth and development of the baby will be normal. 2. Pathological factors: seven-month-old babies do not urinate at night may also be due to fever, diarrhea and other pathological conditions. If the baby has a fever, there will be an increase in water loss, which in turn leads to a decrease in urine output may also occur at night without peeing. Diarrhea can also lead to a decrease in body fluids affecting the urine output of the child. Seven-month-old babies do not pee at night, there may be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause, under the guidance of the doctor to give targeted treatment or treatment.