What is the most common symptoms with depression? how do you know if you have it?

Feeling Good: There are several types of depression. Reactive depression occurs as a result of loss and eventually we adjust. If one does not adjust or if the cause is not clear certainly seek professional help. "feeling good" by david burns is an excellent self-help book based on science. Don't let the thickness of it intimidate you. Take it bit by bit. The very best to you.

Depression help: Depression can be more complicated to recognize than most think. Mood changes, low energy, worsening sleep etc may be some hallmarks; but depression is not always obvious even to family and friends. Depression can also co-exist with or be caused by medical problems. Best to see your pcp and ask for referral to a mental health professional. Depression is treatable! See: http://www.nimh.nih.gov/health/publications/depression-what-you-need-to-know-12-2015/index.shtml#pub4 I hope this helps.

Depression?: The PHQ-9 is a multipurpose instrument for screening, diagnosing, monitoring and measuring the severity of depression: http://www.cqaimh.org/pdf/tool_phq9.pdf If you have or suspect you have depression seek the advice of a qualified mental health professional.

There Are Many: Depression can manifest in many ways. Here are the main symptoms: feeling bad about yourself, losing interest in things that used to bring you joy, fatigue, poor concentration, poor self-esteem, guilt, pessimism about the future, wanting to die or hurt oneself in some way, sleep problems, eating problems. You don't need all of the symptoms to be depressed, so consult with a doctor to confirm.