The document discusses hypertension or high blood pressure. It defines hypertension as a blood pressure reading of 140/90 mmHg or higher. It describes the different types and classifications of hypertension. Risk factors include age, family history, obesity, lack of exercise, too much salt, stress etc. Symptoms are often absent but may include headaches and vision problems. Complications can include heart disease, stroke and kidney disease if left uncontrolled. Treatment involves lifestyle changes like diet, exercise and medication if needed. The goal is to control blood pressure to reduce health risks.