Nearly all indicators of poor mental health and suicidal thoughts and behaviors increased from 2011 to 2021.
The percentage of students who experienced persistent feelings of sadness or hopelessness, seriously considered attempting suicide, made a suicide plan, and attempted suicide increased. The percentage of students who were injured in a suicide attempt did not change.
~
Youth Risk Behavior Survey Data Summary & Trends Report: 2011-2021, [no date]. pdf 
PROGRESS AT-A-GLANCE FOR MENTAL HEALTH AND SUICIDALITY VARIABLES
Poor mental health can result in serious negative outcomes for the health and development of adolescents, which can last into adulthood. Young people who feel hopeless about their future are more likely to engage in behaviors that put them at risk for HIV, STDs, and unintended pregnancy .23,24 Suicide risk, measured here by increasing levels of suicide ideation, plans, and attempts, not only places the life of the adolescent at risk but is also a marker for experience with trauma and other mental health issues.24
Mental health is measured in the YRBS with one question addressing persistent feelings of sadness or hopelessness that affect students’ abilities to participate in their daily activities and another question assessing poor mental health during the past 30 days. YRBS also includes four questions on suicidal thoughts and behaviors: seriously considering suicide, making a suicide plan, attempting suicide, and being medically treated for a suicide attempt.