Baby always wake up in the middle of the night, there may be several reasons: First, the baby is hungry or wet diaper, this situation before bedtime to feed the baby and change the diaper. Second, the baby may be hot and uncomfortable, the baby’s metabolism is relatively vigorous, a few months of the baby, its room temperature at 20 ° -21 ° on it, should not be too hot. The mother is always afraid that the child will freeze, wear too much cover will cause the baby uncomfortable, sleep a while to feel hot, it woke up, so the mother needs to pay attention. Third, the baby sleeps too much during the day, and will be easy to wake up at night. Fourthly, if your baby keeps waking up in the middle of the night, along with excessive sweating and night terrors, you should pay attention to whether there is a calcium deficiency. Especially if your baby is gaining weight quickly and can’t get sunlight during the winter, you should go to the hospital and have your baby’s trace elements checked. If you have a calcium deficiency, you should follow your doctor’s instructions to increase the dose of vitamin D and take calcium supplements as appropriate, but do not blindly give your baby oral calcium supplements at home, because blind calcium supplements are harmful.