Clinical depression is different from usual mood fluctuations and short-lived emotional responses to challenges in everyday life. Depression is a serious health condition, and at its worst, can lead to suicide. The symptoms can include feeling down or worthless, feeling empty, taking no pleasure in things you used to enjoy, a lack of confidence or self-esteem, feeling suicidal.
Severe depression can lead to psychotic symptoms, such as paranoia or hearing voices.
Depression can also lead to self harming behaviours and suicide.
It is very common for patients with depression to show symptoms of anxiety, and vice versa. Common symptoms of anxiety include feeling restless, being agitated and being unable to sleep.