Perimenopause nausea is real, hormonal, and underexplained. Estrogen and progesterone both regulate how the gut moves, how sensitive it is, and how the brain processes nausea signals. When these hormones fluctuate in perimenopause, queasiness follows — through four distinct biological pathways: direct estrogen effects on the gut, hot flash–triggered cortisol surges, sleep deprivation disrupting gut-brain communication, and HRT-related reactions. VibranceWay's Cathy explains e