Every year more than 17 million Americans suffer from clinical depression. It strikes men, women and children of all races and socio-economic groups, causing them to lose motivation, energy and the pleasure of everyday life. Clinical depression often goes untreated because people don't recognize its many symptoms. The good news is that almost everyone who gets treated can soon feel better.

Here is a checklist of ten symptoms of clinical depression. If you experience five or more of these symptoms for longer than two weeks or if the symptoms are severe enough to interfere with your daily routine, you should see your doctor or a qualifed mental health professional.

• A persistent sad, anxious or "empty" mood
• Sleeping too little or sleeping too much
• Reduced appetite and weight loss or increased appetite and weight gain
• Loss of interest or pleasure in activities once enjoyed
• Restlessness or irritability
• Persistent physical symptoms that don't respond to treatment
• Difficulty concentrating, remembering, or making decisions
• Fatigue or loss of energy
• Feeling guilty, hopeless or worthless
• Thoughts of death or suicide

Source: NMHA.