When can we start putting a pillow behind our LOs heads when they sleep? Are there any pillows that can help prevent flat head?

It's locally practiced to use a baby pillow really early. But internationally it is seriously not recommended. Babies under 12 months shouldn't sleep with pillows, stuffed toys, or other soft objects. They can pose an asphyxiation hazard and are complete SID Hazards. So - drop the pillow, blanket and anything else in newborn babies bed pls.