One pole of anxiety-happiness psychosis is characterized by anxiety, accompanied by distrust, ide as of reference, hypochondriacal ideas, ideas of inferiority, and not infrequently sensory illusions as well as occasionally feelings of being influenced. The other pole is characterized by ecstatic mood and feelings of happiness, at times accompanied by ideas of reference and sensory illusions. The basic symptoms need not always be in the foreground. There may be pictures with more or less clear traits of manic-depressive illness, confusion psychosis, or motility psychosis. This is an expression of the polymorphism of anxiety-happiness psychosis. The anxious phases are more common than the ecstatic, so that cases of only anxiety psychosis are frequent, while those of only happiness psychosis are rare. The duration of the various conditions is similar to that of manic-depressive illness, whereas a sudden change between anxious and ecstatic mood occurs often in the same phase. Prepsychotic traits are often found, hinting at a more severe disorder later, that is, a tendency towards becoming greatly excited, the so-called exuberant temperament.