Because the disease usually causes damage gradually -- over the course of several years -- most people with high blood pressure do not experience any symptoms of hypertension. When they are noticeable, symptoms may include blurred vision, dizziness, headache, and nausea. By the time symptoms are felt, serious damage may have already been done to body structures such as blood vessels, the heart, eyes, or brain.
If people do not seek medical care until their symptoms are severe, they may develop malignant hypertension, which generally requires emergency hospitalization. Symptoms of malignant hypertension include lightheadedness, nausea, and headache.
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