Why doesn't a 20-day-old baby sleep?

Patient's question:

My baby is a premature child. I was very worried about the child's condition from the beginning. Recently, the child has appeared in this series of situations, and I am also very worried, afraid that the child will become worse. Please ask why a newborn baby who is 20 days old does not sleep

Doctor's answer:

Hello, if the baby is eating normally, has good bowel and bladder function, and is in good spirits, and only exhibits this phenomenon during sleep, then you don't need to worry too much. This is due to the baby's underdeveloped nervous system, and this phenomenon will gradually improve as the baby grows older. However, if the baby shows any signs of discomfort, then it is necessary to investigate the cause.