It is as if, rather than acting out, young people are turning in on themselves.
Rates of depression and anxiety among teenagers have increased by 70 per cent in the past 25 years.
But perhaps the more interesting question is why is there a crisis in the first place?
With celebrities (Stephen Fry, Ruby Wax, Alastair Campbell) increasingly talking openly about their own mental illnesses, there is much greater awareness than there used to be and correspondingly less stigma, making it easier for teenagers to acknowledge their problems.
During the same time, community mental health service provision also fell, with the number of people on community team caseloads having reduced by seven per cent, staffing levels falling by four per cent and contacts reduced by six per cent.