Hypertension is high arterial blood pressure. Arteries are the blood vessels that carry oxygenated blood from the heart to the body's tissues. Each time the heart beats, it pumps blood into the arteries. Blood pressure is created by the force of blood pushing against the walls of blood vessels (arteries) as it is pumped by the heart. The higher the pressure the harder the heart has to pump. Hypertension is serious because people with this condition have a higher risk for heart disease than people with normal blood pressure. Hypertension also causes degenerative changes in blood vessels supplying to vital organs. Hypertension leads to arteriosclerosis, heart attack, heart failure, stroke, chronic kidney diseases and eye diseases.