Depression.
Rollo May, an American existential psychologist, is often credited with this quote on depression. He believed that depression can often be characterized by a sense of hopelessness and an inability to envision a positive future.
The scientific name for depression is major depressive disorder. It is a common mental health condition characterized by persistent feelings of sadness and loss of interest in activities.
Anger
No, but both are classified as mood disorders.
Cyclothymia is a low-level Bipolar disorder, characterized by alternating periods of mild depression and mania ("hypomania") for extended periods of time.
Depression is feeling sad and defective for no good reason. Manic depression is a mood disorder which combines this feeling along with the opposite mood in a cyclic "mood swing." The opposite of depression is mania. Mania makes you feel elated and invincible. Manic depression now know as Bipolar Disorder is a mood disorder characterized by periods of mania and depression. With MD you sometimes feel euphoric and others you feel depressed and hopeless. With depression you feel like this all the time.
Cyclothymia is a low-level bipolar disorder, characterized by alternating periods of mild depression and mania ("hypomania") for extended periods of time.
The crash, boom and bust, with lots of excess and spending were the boom years. All of these led to the Great Depression in 1929.
Major depression is also known as unipolar. That means there is only one extreme; that of extreme lows. Manic depression is known as bipolar disorder (manic depression is the old name). This has two extremes; periods of extreme depression and extreme elation.
There are several different types of Bipolar disorder, all of which are characterized by highs (mania) and lows (depression). I recommend below beyond blue website for more info
There is no such thing as an underactive thyroid diet. An underactive thyroid, however, is characterized by symptoms including weight gain, depression, and sensitivity to coldness.