It is a hazardous situation for babies from newborn to 3 years old to sleep with a pillow. Embedding the baby's head in the pillow may result in suffocation. You are likely to encounter a situation that is so dire that it can also cause changes in the baby's body temperature, known as sudden infant death syndrome. The most suitable age range for pillow use is 3-6 years. You can find more detailed information in our article "The 5 Best Toddler Pillows" at this link