Preeclampsia is a pregnancy complication characterized by high blood pressure and signs of damage to other organ systems, most often the liver and kidneys. It usually occurs after 20 weeks of pregnancy and can lead to serious complications for both the mother and baby if left untreated. Preeclampsia is diagnosed through regular prenatal check-ups that include blood pressure measurements and urine tests to check for protein. Treatment may include bed rest, medications to lower blood pressure, and early delivery of the baby. It is important for pregnant women to attend regular prenatal care to monitor and manage the risk of preeclampsia.