Emotions like sadness, fear, worry, and stress are typical aspects of life experienced by many. However, if these negative emotions consume oneself and outweigh the positives of everyday life, you may have a mental disorder. Mental disorders, also known as mental illnesses, affect a person’s feeling, thinking, behavior and mood and may last for long periods of time. With a mental disorder, normal daily functions such as going to work, or school can become increasingly challenging, and recovery may seem out of reach. Often, the affected person may not even realize that they are living with a mental disorder. Below is a list of common mental disorders and their symptoms, statistics, treatment, as well as the history of the disorder to help spread awareness and inform those seeking insight.