Signs and Symptoms 
If you have been experiencing some of the following signs and symptoms most of the day, nearly every day, for at least two weeks, you may be suffering from depression.
  • Persistent sad, anxious, or “empty” mood
  • Feelings of hopelessness, or pessimism
  • Irritability
  • Feelings of guilt, worthlessness, or helplessness
  • Loss of interest or pleasure in hobbies and activities
  • Decreased energy or fatigue
  • Moving or talking slowly
  • Feeling restless or having trouble sitting still
  • Difficulty sleeping, early-morning awakening, or over sleeping
  • Appetite and/or weight changes
  • Thoughts of death or suicide, or suicide attempts
  • Aches or pains, headaches, cramps, or digestive problems without a clear physical cause and/or that do not ease even with treatment
According to the National Institute of Mental Health, depression is a common but serious mood disorder. It causes severe symptoms that affect how you feel, think, and handle daily activities, such as sleeping, eating, or working. To be diagnosed with depression, the symptoms must be present for at least two weeks.
Treatment 
Depression, even the most severe cases, can be treated. The earlier the treatment can begin, the more effective it is. Depression is usually treated with medications, psychotherapy, or a combination of the two. No two people are affected the same way by depression and there is no “one-size-fits-all” for treatment. It may take some trial and error to find the treatment that works best for you.