Symptoms of depression vary from person to person. But the common link for any of these symptoms is that they continue for a prolonged period of time.

Symptoms of depression may include:

Emotional symptoms:

• Persistent sadness, anxiety, or “empty” mood
  
  
• Feelings of hopelessness or pessimism
  
  
• Feelings of guilt, worthlessness, or helplessness
  
  
• Loss of interest or pleasure in hobbies and activities
  
  

Physical symptoms:

• Fatigue or decreased energy
  
  
• Insomnia or oversleeping
  
  
• Appetite or weight changes
  
  

Aches, pains, headaches, or digestive problems without a clear physical cause

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Cognitive symptoms:

• Difficulty concentrating, remembering, or making decisions
  
  
• Slowed thinking or movement
  
  
• Thoughts of death or suicide
  
  

For a diagnosis of depression, these symptoms must last for at least two weeks and represent a change from previous functioning.