Dr Alvin Ng Dr Alvin is an associate professor of clinical psychology at Sunway University and the founding president of the Malaysian Society of Clinical Psychology.
Shades Of Depression Being depressed is a complex condition and exists in more than one form.
Major Depressive Disorder (MDD)
This main form of depression ranges from moderate to severe and can last about two weeks consecutively or intermittently about six months.
Dysthmia is more prolonged but less severe than MDD whereby someone shows depressive symptoms at lower severity for two years or more. Someone who suffers from this and MDD is considered to have double depression.
Manic Depression/ Bipolar Disorder
This depression is where a person has bouts of mania with inflated sense of self, feeling on top of the world, and then finally crashing down to depression. A prolonged version of this is called cyclothymia.
Premenstrual Dysphoric Disorder
A relatively new category, the premenstrual dysphoric disorder is where depressive symptoms appear as part of pre-menstrual cycles.