euphoria refers to an exaggerated sense of well-being.
Other /More definition:
Euphoria is defined as the emotion of elation; elevated mood.
Euphoria is a desirable and natural occurrence when it results from happy or exciting events. An excessive degree of Euphoria that is not linked to events is characteristic of Hypomania or Mania, Abnormal mood states associated with Bipolar disorders.
Please see also Bipolar disease.
List of books: Euphoria