Major depressive disorder (MDD) is an illness that has an influence on the way people feel, think, and act. Some individuals suffer a single episode of depression, while others have multiple episodes during their lifetime. The Diagnostic and Statistical Manual of Mental Health Disorders, 5th Edition (DSM-5) is used to diagnose depression. The symptoms to diagnose a person with MDD must persist for at least two weeks and include five or more of the following. The symptoms
