Our 19-year-old daughter was diagnosed with bipolar disorder at age 17, after six years of variable psychiatric symptoms. Many cases of bipolar illness feature onset during childhood, adolescence or young adulthood. With the myriad of normally-occurring changes during this age, it can be hard for a parent to identify and understand the early, often-subtle symptoms of psychiatric problems — especially bipolar disorder. At age 11, our daughter had obsessive thoughts and was diagnosed...