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High blood pressure, or hypertension (HTN), is a common condition in the United States. High blood pressure is termed a “silent killer” because it usually does not have symptoms but can cause significant cardiovascular and organ damage. The only way to know if you have high blood pressure is to get tested. High blood pressure can be controlled with lifestyle changes and medications. Uncontrolled high blood pressure can lead to life threatening medical conditions.

Your heart pumps blood throughout your body. Your blood pressure is a measure of how hard your heart works to force the flow of blood. Your blood pressure measurement reflects systolic and diastolic pressure. Your systolic pressure is the amount of force that occurs when your heart contracts to pump blood out of your heart. Your diastolic pressure is the minimum pressure between heartbeats when the heart is relaxed.
Your blood pressure is recorded as two numbers. Your systolic blood pressure is recorded as the top number and your diastolic blood pressure is the bottom number. For example, a blood pressure that is 120/80 mm Hg is stated as “120 over 80.” In this instance, the systolic blood pressure is 120 and the diastolic blood pressure is 80.
In about 10% of people, high blood pressure is caused by another medical condition. This is termed secondary hypertension. Conditions that can cause high blood pressure include kidney disease, adrenal gland tumors, coarctation of the aorta (being born with a narrowed aorta), pregnancy, using birth control pills, alcohol abuse, and thyroid dysfunction. In most cases, if the source of secondary hypertension is treated, blood pressure can return to normal.
In about 90% of people, the cause of high blood pressure is not known. This is termed primary hypertension. Many risk factors are associated with primary hypertension.
High blood pressure usually does not have symptoms. High blood pressure has been termed a “silent killer” because although people may not have symptoms, progressive damage can occur to the heart, blood vessels, and other organs. People can have high blood pressure for years and not know it. The only way to find out if you have high blood pressure is to have your blood pressure checked.
Severe high blood pressure and malignant high blood pressure can cause headaches, vision problems, lightheadedness, nausea, and vomiting. Malignant high blood pressure, a hypertensive crisis, is high blood pressure that rises rapidly. The diastolic blood pressure often exceeds 140 mmHg. You should go to a hospital emergency department if your diastolic pressure is greater than 100 mm Hg. You should call an ambulance if you experience the symptoms of a stroke or heart attack, which may include severe headache, dizziness, fainting, blurred vision, loss of vision, chest pain, shortness of breath at rest, and weakness.
The only way to find out if you have high blood pressure is to have it measured with a blood pressure cuff. Having your blood pressure checked is quick and painless. A blood pressure cuff is placed around your arm and inflated. As air in the cuff is released, a person listens to your pulse. Blood pressure is classified as normal, prehypertension, or high.
Classification Systolic (Top Number) Number) Diastolic (Bottom Number)
Normal Less than 120 Less than 80
Prehypertension 120-130 80-89
High Blood Pressure- Stage 1 140-159 90-99
High Blood Pressure- Stage 2 160 or Higher 100 or Higher
If you have high blood pressure, your doctor may order tests to check your organs for damage. Such tests may include blood tests, urine tests, an eye exam, or imaging tests. Specific tests may be used to detect heart or blood vessel damage.
The goal of treatment is to keep blood pressure below 140/90 mmHg. The goal is lower, 125-130/80 mmHg, for people with diabetes, chronic kidney disease, or a prior heart attack or stroke. You doctor can tell you what your specific goal should be. Treatment of secondary conditions can return blood pressure to normal. Treatment for high blood pressure usually consists of lifestyle changes, medications, or both.
Some people can lower their blood pressure with lifestyle changes including weight loss, exercise, and dietary changes. You should work towards achieving and maintaining your ideal weight. Even a small weight loss is beneficial. It is helpful to eat low fat, low calorie, low cholesterol, high fiber, and low salt foods. You should eliminate using table salt. The Dietary Approaches to Stop Hypertension (DASH) diet is a guide for people with high blood pressure. You should quit smoking and avoid alcohol. If making lifestyle changes are difficult for you, your doctor can refer you to resources for assistance and support.
Medications to treat high blood pressure may also be used along with lifestyle changes. There are many prescription medications that work in different ways to treat high blood pressure. Your medication or dose may need to be changed over time.
It is very important that you take your medications according to your doctor’s instructions. You should take your medication as directed, even if you feel better. It is also important to monitor your blood pressure per your doctor’s instructions. You should make and keep all of your doctor appointments. The prognosis is usually good for high blood pressure that is controlled. You may need to take medication for the rest of your life, unless you can lower your blood pressure with significant lifestyle changes. Uncontrolled high blood pressure can lead to life threatening medical complications.
It is helpful to reverse the risk factors for high blood pressure that you can control. Some people can control or prevent high blood pressure with healthy lifestyle choices. It is helpful to lose excess weight and maintain a healthy weight. Regular exercise is important. You should quit smoking and not use alcohol or illegal drugs. It is helpful to eat low fat, low calorie, low cholesterol, high fiber, and low salt foods. You should eliminate using table salt. The DASH diet has helpful food guidelines for people with high blood pressure.
It is important to take all of your medications as directed, even if you feel fine. Monitor your blood pressure per your doctor’s instructions. You should make and keep all of your doctor’s appointments.
High blood pressure is a common problem in the United States. Risk factors may increase your likelihood of high blood pressure, although some people that experience high blood pressure do not have any risk factors. People with all of the risk factors may never develop high blood pressure; however, the likelihood increases with the more risk factors you have. You should tell your doctor about your risk factors and discuss your concerns.
Risk factors for high blood pressure:
High blood pressure is the number one risk factor for stroke. High blood pressure is a major risk factor for an enlarged heart, heart attack, heart failure, kidney failure, atherosclerosis, peripheral artery disease, aortic aneurysms, and blindness. High blood pressure combined with obesity, smoking, high cholesterol, or diabetes increases the risk for heart attack or stroke even more.
There are a several types of blood pressure monitors that you can use at home. Some types of monitors allow you to take your own blood pressure. In addition to the arm cuff style, there are wrist monitors and finger monitors. Some blood pressure monitors store or print out your blood pressure results. Additionally, some home health services use computerized blood pressure monitors that send your results directly to your doctor for regular monitoring.
This information is intended for educational and informational purposes only. It should not be used in place of an individual consultation or examination or replace the advice of your health care professional and should not be relied upon to determine diagnosis or course of treatment.

The iHealthSpot patient education library was written collaboratively by the iHealthSpot editorial team which includes Senior Medical Authors Dr. Mary Car-Blanchard, OTD/OTR/L and Valerie K. Clark, and the following editorial advisors: Steve Meadows, MD, Ernie F. Soto, DDS, Ronald J. Glatzer, MD, Jonathan Rosenberg, MD, Christopher M. Nolte, MD, David Applebaum, MD, Jonathan M. Tarrash, MD, and Paula Soto, RN/BSN. This content complies with the HONcode standard for trustworthy health information. The library commenced development on September 1, 2005 with the latest update/addition on February 16, 2022. For information on iHealthSpot’s other services including medical website design, visit