Hypertension, or high blood pressure, is a condition where systolic blood pressure is greater than or equal to 140 mm Hg or diastolic blood pressure is greater than or equal to 90 mm Hg. Hypertension usually develops gradually over many years and can damage target organs like the heart, brain, and kidneys if left untreated. Risk factors for hypertension include increasing age, family history, obesity, sedentary lifestyle, smoking, excessive alcohol consumption, and certain medical conditions like diabetes. Lifestyle changes such as losing weight, exercising regularly, reducing salt and alcohol intake, quitting smoking, and following medical treatment can help prevent and manage hypertension.