mental health conditions are common among teens and young adults. 50 of all lifetime mental illnesses develop by age 14 and 75 develop by age 24. A mental health condition isnt your fault or your familys fault these conditions develop for complicated reasons that researchers are only just starting to understand. in no particular order, here are the 5 most common mental illness affecting teens today. Anxiety disorders a recent phenomenon that may explain the sharp increase in mental disorders among youth is the smartphone. Identifying teenage mental illness symptoms can be difficult. Thats because most teens are moody and emotional during this time of dramatic physical and mental changes. However, mental illness in teens involves behavioral and mood changes that are far more extreme than average. a mental health disorder, if left undiagnosed and untreated, can become a more serious disorder in adulthood. Also, unmanaged mental illness can wreak havoc in all areas of a teens life, including the academic, social, physical, and interpersonal aspects. Unfortunately, mental illness is not that uncommon in teenagers. Weve compiled a list of the most common mental illnesses in teens and their symptoms. But many types of mental illness are treatable, and its just a matter of pinpointing the diagnosis. Here are 6 facts about mental illness in teens that parents should be aware of. Physicians define mental illness differently than most of us do. Mental illnesses like depression, anxiety and bipolar disorder affect thousands of teens across the country every year. These statistics point to their prevalence and the need for compassionate counsel and care from loved ones. Each year in america, 1 in 5 teens aged 1318 experience a mental health. Mental health has become an important aspect of healthcare worldwide. Alison allowing anyone to study anything, anywhere and at any time for free since 2007.