HELLP syndrome is a serious complication of Pregnancy-Induced Hypertension (PIH) which is very dangerous for the mother and her foetus. The prognosis depends on early diagnosis and correct treatment. The etiopathogenesis of the syndrome is still investigated but remains unclear. Taking as an example the precisely monitored, fully symptomatic case of the HELLP syndrome, we present review of modern opinions on pathogenesis, recognition and treatment.