A new study finds that using pillows that are too high may trigger spontaneous vertebral artery dissection, a cause of stroke. When using high pillows, the neck bends to a greater extent, especially when turning over and causing the neck to rotate, which can easily damage blood vessels.
Researchers point out that sleeping high is not worry-free, and people need to pay more attention when choosing pillows. The study was carried out by Japan's National Center for Circulatory Disease Research and other institutions.