The bone spurs identified in the study ranged in size from 10 to 31 millimeters. Some were so big that they could be felt as a lump on the back of the head.
The development of these growths may be attributed to, and explained by, extensive screen-time, the researchers said. Sustained “forward head flexion,” or bending the head down, and poor posture could be the reasons for these physiological changes, they hypothesized.
https://www.tgvpress.com/2019/06/20/smartphone-skull-bumps-bizarre-discovery-while-examining-hundreds-of-x-rays/
