Depression symptoms can include feelings of sadness, isolation, loneliness, hopelessness, and helplessness.

“Depression (major depressive disorder or clinical depression) is a common but serious mood disorder. It causes severe symptoms that affect how you feel, think, and handle daily activities, such as sleeping, eating, or working. Common forms of depression include persistent depressive disorder, seasonal affective disorder, and psychotic depression.

National Institute of Mental Health, February 2018