1. Reasons why babies are nauseous There are many reasons why babies are nauseous, which may be improper diet, unbalanced growth and development, environmental influences, etc. For different situations, we need to take different measures to help the baby fall asleep. 2. Develop good sleeping habits. Developing good sleeping habits is an important step in helping your baby fall asleep. First of all, we need to create a quiet, comfortable and warm sleeping environment for the baby. Secondly, we need to give enough attention and comfort, gently lull him to sleep, give him warm hugs, etc. at last,