Baby pillow adult arm harm is to affect the baby’s sleep quality and habits, affecting the baby’s cervical spine development, may also compress the neck blood vessels, it is recommended not to let the baby pillow adult arm sleep. Because the baby is young, the cervical spine development is not complete, often pillow adult arm will lead to the baby cervical vertebrae physiological curvature change, which affects the baby’s cervical spine development. At the same time, pillow adult arm may also compress the baby’s neck blood vessels, resulting in poor blood circulation, which in turn affects the baby’s sleep quality. The baby often pillow adult arm sleep, not only will lead to the baby’s sleep quality decline, at the same time will also develop bad sleep habits. Therefore, there are many hazards for babies to sleep on an adult’s arm, and it is recommended not to sleep on an adult’s arm.