Seasonal affective disorder (SAD) - a form of depression most often associated with fewer hours of daylight in the far northern and southern latitudes from late fall to early spring.Bipolar disorder - also called manic depression or bipolar affective disorder, depression that includes alternating times of depression and mania.Major depressive disorder - prolonged and persistent periods of extreme sadness.Mood disorders may increase your risk of suicide. Anxiety disorders can also affect your mood and often occur along with depression.
