He asked the question “Does depression occurs in children” and if so, points out that depression often precedes manic or hypomanic episodes, and since 25-50% of children who have depression in childhood grow up to have full blown manic or hypomanic episodes, isn’t it then reasonable to believe that they had bipolar disorder all along?
Does it mean that they have “major depressive disorder” until age 20, at which point their disease magically changes to something completely different: bipolar disorder? Or is it rather the case that they have bipolar disorder from the very start, with the first episodes of their mood illness being depressive episodes, and manic episodes beginning later? This is a course of bipolar illness, depression preceding mania, that has been described for over a century. (Dr. Nassir Ghaemi Psychology Today)
You should read his entire article, it’s not that long, but very interesting.
Check it out:
Depression in Children: Proof of Bipolar Disorder
Dr. Ghaemi’s First Article in a Series: