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Scientists say that smartphones are changing the [shapely / shape] of people's skull. Some people are [spending / spent] so long looking at smartphones that a small bony bump is [appearance / appearing] above their neck. Doctors say the bump is large [enough / sufficient] to feel by pressing the bottom of the skull, [just / justly] above the neck. Dr David Shahar, a health [science / scientist] at the University of The Sunshine Coast in Australia, spoke to the BBC about the discovery. He said: "I have been a [clinic / clinician] for 20 years, and only in the last decade, increasingly, I have been discovering that my [patience / patients] have this growth on the skull." The bump is becoming more [frequent / frequency] among 18 to 30-year-olds who spend many hours a day [hunched / hunch] over their smartphone.

A study led by Dr Shahar looked [on / at] the smartphone use of 1,200 people aged 18 to 86. Shahar said 18 to 30-year-olds were more [likelihood / likely] to have the skull bumps than [older / olden] generations. He said the bumps will probably be [many / more] common as we spend longer bending our necks [which / while] looking at their phones. Doctors say the bump could come from [constantly / creating] bending the neck at unnatural angles to look at digital devices. Our head [weighs / weights] about 4.5 kilograms and bending our head at the same angle for a [length / long] time can strain the neck. Doctors are calling this strain "text neck". They say the skull bump rarely [because / causes] health issues. They advised people to change their posture if their neck becomes [sore / soar] .