"Dual diagnosis" is generally defined as a drug or alcohol addiction in conjunction with one or more co-occurring mental health disorders or conditions. These disorders include depression, anxiety, mania or bipolar disorder, borderline personality disorder, psychoses, schizophrenia, obsessive-compulsive, PTSD, and others. Without treatment of both the addiction and the mental health disorder, either problem can easily exacerbate the other, leading to a downward spiral of mental health problems and addictive behavioral problems. If you or a loved one is suffering from a dual diagnosis, it is important to seek proper treatment, as the combination of addiction and mental health disorders can be devastating to individuals and families and lead to massive unmanageability and negative consequences in life.