Scientists say that smartphones are changing the of people's skulls. Some people are spending so looking at smartphones that a small bump is appearing above their neck. Doctors say the bump is large to feel by pressing the bottom of the skull, just above the neck. Dr David Shahar, a health at the University of The Sunshine Coast in Australia, spoke to the BBC about the . He said: "I have been a for 20 years, and only in the last decade, increasingly, I have been discovering that my have this growth on the skull." The bump is becoming more among 18 to 30-year-olds who spend many a day hunched over their smartphone.
A study led by Dr Shahar looked at the smartphone of 1,200 people aged 18 to 86. Shahar said 18 to 30-year-olds were more to have the skull bumps than older . He said the bumps will probably be more as we spend longer bending our necks while looking at their phones. Doctors say the bump could come from bending the neck at unnatural angles to look at digital devices. Our weighs about 4.5 kilograms and bending our head at the same for a long time can strain the neck. Doctors are calling this "text neck". They say the skull bump causes health issues. They advised people to change their if their neck becomes sore.