Some people are (2) ____________ so long looking at smartphones that a small bony (3) ____________ is appearing above their neck.

Doctors say the bump is large enough to feel by pressing the bottom of the skull, (4) ____________ above the neck. Dr David Shahar, a health scientist at the University of The Sunshine Coast in Australia, spoke to the BBC about the (5) ____________.

He said: "I have been a clinician for 20 years, and only in the last (6) ____________, increasingly,

I have been discovering that my patients have this (7) ___________ on the skull.

" The bump is becoming more (8) ____________ among 18 to 30-year-olds who spend many hours a day hunched over their smartphone.

A study led by Dr Shahar looked at the smartphone (9) ____________ of 1,200 people aged 18 to 86

Shahar said 18 to 30-year-olds were more (10) ____________ to have the skull bumps than older generations.

He said the bumps will probably be more (11) ____________ as we spend longer bending our necks while looking at their phones.

Doctors say the bump could come from (12) ____________ bending the neck at unnatural (13) ____________ to look at digital devices.

Our head weighs about 4.5 kilograms and (14) ____________ our head at the same angle for a long time can strain the neck.

They advised people to change their (16) ____________ if their neck becomes sore.