What is ‘problematic smartphone use’ and should we worry about it?

Two studies have linked “problematic smartphone use” to higher rates of anxiety, depression and insomnia among teenagers, but the researchers haven’t shown that excessively using such devices directly causes these issues  New Scientist – Health

​Two studies have linked “problematic smartphone use” to higher rates of anxiety, depression and insomnia among teenagers, but the researchers haven’t shown that excessively using such devices directly causes these issues