In the first month of the newborn, whether to choose to lie flat or on the side is a doubt in the minds of many novice parents. In fact, this decision is not set in stone, but needs to be flexibly adjusted according to the baby's physical condition and sleeping environment. 
Let's start by talking about the flat sleeping position. For newborns, lying flat is undoubtedly a safe sleeping position. Because your baby's respiratory system is not yet fully mature, lying flat can help keep your airway open, which can reduce the risk of suffocation. In addition, lying flat also helps your baby's body balance and symmetry develop. However, this does not mean that lying flat is risk-free. When the baby is sleeping, if the pillow, quilt and other items accidentally cover the mouth and nose, it may cause a suffocation accident. Therefore, parents need to be highly alert when their babies are sleeping soundly to ensure the safety of their surroundings. Let's take a look at the sleeping position on your side. The sleeping position on the side also has its advantages for newborns. Not only does it reduce the risk of snoring and choking, but it also effectively relieves your baby's digestive discomfort. However, sleeping on the same side for long periods of time may cause your baby's head and face to develop asymmetrically. In addition, without adequate support, your baby may roll into unsafe positions during sleep, increasing the risk of suffocation. 
Therefore, for the question of whether the newborn should lie flat or on his side in the first month, it is recommended that parents make a decision based on the actual situation of the baby and the sleeping environment. If your baby is in good physical condition and has a safe sleeping environment, you can try to sleep on your side. But at all times, make sure your baby's sleeping environment is safe and avoid anything that could cause suffocation. In addition, no matter which sleeping position your baby chooses, parents need to pay attention to the following: First, make sure that your baby's sleeping environment is safe and avoid anything that may cover your mouth and nose. Maintain the right temperature and humidity to ensure your baby can sleep comfortably. 
Secondly, always pay attention to your baby's sleeping position. Make sure your baby's head and body are adequately supported to avoid suffocation or developmental asymmetry caused by improper sleeping position. Finally, change your baby's sleeping position regularly. In order to avoid the developmental asymmetry caused by staying in the same sleeping position for a long time, parents can adjust the baby's sleeping position in a timely manner. 
To sum up, the choice of sleeping position in the first month of the newborn is not static, but needs to be flexibly adjusted according to the actual situation and sleeping environment of the baby. Parents need to be vigilant to ensure that their baby's sleeping environment is safe and to keep an eye on changes in their baby's sleeping position. In the meantime, it is advisable to consult a doctor or professional for more detailed and professional advice.