The reasons why a six-month-old baby wakes up easily at night are as follows: 1. When a six-month-old baby is deficient in calcium it causes increased neuroexcitability, and there will be easy waking up at night, and some even wake up easily and cry. This situation should first calcium supplementation, to see if there is improvement, or directly to the hospital to test the trace elements, if the lack of calcium will need to supplement calcium, while adjusting the dose of vitamin D. 2, if the surrounding area is not quiet, noise, will also affect the baby’s sleep, so that the baby is easy to wake up, in this case you need to check what electrical appliances have noise at home. 3, as the baby grows up, the amount of milk will The amount of milk before bedtime is not enough, when the baby appears hungry in the middle of the night, will also wake up looking for food, parents need to adjust the amount of milk in time to avoid the baby waking up hungry in the middle of the night. 4, when the baby is sick, such as abdominal pain, bloating, nasal congestion, runny nose, cough and other uncomfortable symptoms, will also be the cause of the baby waking up in the middle of the night, you need to seek medical treatment in a timely manner.