The causes of waking up in infants may be nightmares, sleep environment problems, lack of nutrients, etc., and need to take appropriate ways to improve for different reasons. 1. Nightmares: Babies waking up in their sleep may be caused by nightmares, at this time the baby will be crying and should be properly soothed, such as gently patting the back with the hand. 2. Poor sleeping environment: If the indoor temperature is too high or too low, and the light in the bedroom is too bright, it can also cause babies to wake up in their sleep, so they should set up a good sleeping environment for their children. 3. Lack of nutrients: If the baby lacks calcium and other nutrients, the baby will wake up and need to be examined and treated with medication, such as calcium tablets and vitamin D preparations. When the baby waking up frequently, should be timely medical examination and treatment, avoid blindly use of drugs. The above medication should be taken in accordance with the doctor’s advice.