High blood pressure is often called "the silent killer" because people often show no symptoms at all when their blood pressure becomes elevated. In some cases headaches are a warning sign but many victims feel fine while suffering from dangerous hypertension.A normal blood pressure reading is 119/79 mm Hg or lower. Prehypertension starts when readings fall between 120/80 mm Hg and 139/89 mm Hg. When numbers reach 140/90 mm Hg or higher, patients are diagnosed with high blood pressure.Throughout … [Read more...]