How Does Depression Differ From Occasional Sadness?

Everyone feels sad or "blue" on occasion. It is also perfectly normal to grieve over upsetting life experiences, such as a major illness, a death in the family, a loss of a job or a divorce. But, for most people, these feelings of grief and sadness tend to lessen with the passing of time.

However, if a person's feelings of sadness last for two weeks or longer, and if they interfere with daily life activities, something more serious than "feeling blue" may be going on.

Depressed individuals tend to feel helpless and hopeless and to blame themselves for having these feelings. People who are depressed may become overwhelmed and exhausted and may stop participating in their routine activities. They may withdraw from family and friends. Some may even have thoughts of death or suicide.