Question: What is the difference between depression and sadness?
Answer: There's a difference between depression and sadness.
Depression causes problems with regard to a person's functioning. And the symptoms of depression typically last at least two weeks or longer. Sadness is one the of the symptoms of depression, but with depression you have more than just sadness.
You have other symptoms as well, and the diagnosis requires that you have not only sadness for two weeks or longer, but also some of these other associated symptoms that I was talking about earlier such as lost of interest, and inability to sleep at night, trouble with your weight and your appetite, as well as feeling guilty, having trouble concentrating, and having suicidal thoughts.