Depression can affect any person at any time during the course of their life. There are many different causes of depression and anxiety, including genetics, chronic conditions, personality traits and traumatic or difficult life events. If you or someone you know has been experiencing symptoms such as moodiness, high stress, anxiousness, inability to focus or make a decision, or long periods of feeling down or sad, your doctor may request a depression or behavioral screening. This screening may include a psychological evaluation from a mental health professional and blood work to check for imbalances in your blood chemistry. Depression and anxiety are treatable, natural conditions that can be controlled through medication, therapy and lifestyle adjustments, all under the supervision of a mental health specialist.