Mental illnesses are associated with distress and/or problems functioning in social, work or family activities. Mental illness is common.

Mental illnesses are health conditions involving changes in emotion, thinking or behavior (or a combination of these).

In a given year: nearly one in five (19 percent) U.S. adults experience some form of mental illness one in 24 (4.1 percent) has a serious mental illness* one in 12 (8.5 percent) has a diagnosable substance use disorder Mental illness is treatable. The vast majority of individuals with mental illness continue to function in their daily lives.