: Persistent low mood, feelings of hopelessness, guilt, worthlessness, or irritability.
: Difficulty concentrating, memory problems, indecisiveness, and thoughts of death or suicide. Contributing Factors Depression - National Institute of Mental Health (NIMH) Depression.zip
: Changes in appetite or weight, chronic fatigue, sleep disturbances (insomnia or oversleeping), and unexplained aches or pains. : Persistent low mood, feelings of hopelessness, guilt,
: It significantly interferes with a person's ability to handle daily activities, such as sleeping, eating, and working. : Persistent low mood
Depression (clinical depression or major depressive disorder) is a serious mood disorder that causes persistent feelings of sadness and a loss of interest in activities once enjoyed. It is not a sign of weakness or something a person can simply "snap out of". Key Characteristics