Final answer:
Hypertension is a risk factor for heart and renal disease, causing high blood pressure and putting strain on the heart. It can lead to heart attacks, strokes, and heart failure if left untreated.
Step-by-step explanation:
Hypertension is a major risk factor for cardiovascular diseases such as heart and renal disease. It causes high blood pressure, which puts extra strain on the heart and can lead to heart attacks, strokes, and heart failure. Additionally, if left untreated, hypertension can also lead to kidney failure and blindness.