Hyperemesis gravidarum is severe pregnancy nausea and vomiting that often needs medical care, and the most effective management includes IV hydration, electrolyte replacement, and anti-nausea medications prescribed by a doctor (such as ondansetron or metoclopramide). Mild relief may also come from small frequent meals, bland foods (crackers, toast), ginger, vitamin B6, and avoiding triggers like strong smells or fatty foods, but diet alone is usually not enough in severe cases. A pregnant woman should seek immediate medical attention if she cannot keep fluids down, has signs of dehydration (dark urine, dizziness), rapid weight loss, or vomiting multiple times daily, as untreated HG can affect both maternal and fetal health and may require hospital treatment.