More than a month should be able to correct it. Wait for the baby to fall asleep before turning his head in the other direction. If the baby falls asleep and changes back to his original side, you can put clothes or diapers under the pillow in the direction he likes. Our baby is like this, and others say that we have a good head sleep. Of course, adults must observe more, which will be more difficult. By the way, the choice of pillow is also very important. Rice pillows, tea pillows and chrysanthemum pillows are all very good. The baby's grandmother made a chrysanthemum pillow for the baby, which not only slept comfortably, but also made the baby smell of chrysanthemum!