But, postpartumpreeclampsia sometimes develops up to six weeks or later after childbirth. This is known as late postpartumpreeclampsia. Postpartumpreeclampsia requires prompt treatment. Left untreated, postpartumpreeclampsia can cause seizures and other serious complications. Postpartumpreeclampsia causes a dangerous spike in blood pressure after giving birth. We asked experts to explain what youneedtoknow. Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers. This empowers people to learn from each other and to better understand the world. Postpartumpreeclampsia happens when a woman’s blood pressure goes above 140/90 after childbirth. It can happen within the first few days or up to six weeks following delivery after giving birth. Postpartumpreeclampsia is different from preeclampsia, a condition that occurs while you’re pregnant. Postpartumpreeclampsia only happens after the baby is born. Even people who have never had high blood pressure or preeclampsia can get postpartumpreeclampsia. The incidence ofpostpartumpreeclampsia is 0.3% to 27.5%.4 The exact number ofpostpartumpreeclampsia cases is not fully known since most patients with this condition present to the emergency department (ED) for care.