Human: How do I know if I am suffering from depression? Assistant: 
Depression is a mental health condition characterized by feelings of sadness, hopelessness and low self-worth. Symptoms can include changes in sleep or appetite, difficulty concentrating, feeling restless or slowed down, losing interest in activities you once enjoyed, feeling worthless or guilty, and thoughts of suicide or death. If you are experiencing these symptoms for two weeks or longer, it is important to seek professional help.