Many mental disorders such as depression, anxiety, bipolar disorder tend to manifest in young adults in the 20’s and early 30’s. It is a combination of genetics, biochemical, neurological, environmental factors. Going away to college is a major stressor that may push some over the edge and causes biochemical changes. Because of all of these factors, parents or even helicopter parents should not be blamed as causing depression, etc. There is usually a genetic predisposition for many of these mental illnesses.