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A small bump is appearing on the skull of some smartphone users. It is big enough to feel. A doctor told the BBC about the bump. He said in the last ten years, he has seen more patients with the bump. A lot of people aged 18 to 30 have the bump. They spend many hours every day bent over their smartphones.
The doctor looked at 1,200 people aged 18 to 86. Younger people had more skull bumps. The bumps are because people bend their necks while looking at their phones. People bend their neck at an angle and it becomes sore. Doctors call this "text neck". Doctors told people to change their sitting position if their neck hurts.
Back to the skull shape lesson.