In 2019, 13 percent of adolescents reported having a major depressive episode, a 60 percent increase from 2007. Emergency room visits by children and adolescents in that period also rose sharply for anxiety, mood disorders and self-harm. And for people ages 10 to 24, suicide rates, stable from 2000 to 2007, leaped nearly 60 percent by 2018, according to the Centers for Disease Control and Prevention.

The decline in mental health among teenagers was intensified by the Covid pandemic but predated it, spanning racial and ethnic groups, urban and rural areas and the socioeconomic divide. In December, in a rare public advisory, the U.S. surgeon general warned of a “devastating” mental health crisis among adolescents. Numerous hospital and doctor groups have called it a national emergency, citing rising levels of mental illness, a severe shortage of therapists and treatment options, and insufficient research to explain the trend…

The crisis is often attributed to the rise of social media, but solid data on the issue is limited, the findings are nuanced and often contradictory and some adolescents appear to be more vulnerable than others to the effects of screen time. Federal research shows that teenagers as a group are also getting less sleep and exercise and spending less in-person time with friends — all crucial for healthy development — at a period in life when it is typical to test boundaries and explore one’s identity. The combined result for some adolescents is a kind of cognitive implosion: anxiety, depression, compulsive behaviors, self-harm and even suicide.