She would typically experience a period of 'mania' and then suddenly become deeply depressed.
The band was part of the early rock-and-roll 'mania'. [='craze']
The entire city has been gripped by baseball 'mania'.
(..) We think it started right after Bo was born. Probably a form of postpartum psychosis. She'd have violent mood swings ranging from mania, where she'd be elated and make elaborate plans for the future, to severe depression, where she'd become almost catatonic, (..)2016 Captain Fantastic