Hyperonirism: When vivid dreams never stop at night

A rare sleep phenomenon called hyperonirism, marked by intense and continuous dreaming, unrefreshing sleep, and daytime fatigue, has been detailed in a new French study. First described by two American doctors in 1995, it leaves patients feeling exhausted despite sleeping. The study, published in June in the journal L'Encéphale by researchers from Paris and Strasbourg, examined four patients. One 40-year-old woman dreams seven nights a week, while another patient reports dreams so vivid she sometimes confuses them with real memories, with symptoms worsening after postpartum depression. Lead author Professor Pierre Alexis Geoffroy and colleagues titled their paper "The Tyranny of Dreams." The condition often brings patients to seek help for afternoon sleepiness and fatigue, with dream content frequently involving mundane daily activities that systematically fail.