Heart Health High Blood Pressure Causes & Risk Factors Hypertension Guide Hypertension Guide Overview Symptoms Causes Diagnosis Treatment Coping What Causes High Blood Pressure (HBP)? Sudden or Chronic Hypertension From Medication, Disease, and Lifestyle Factors By Angelica Bottaro Published on July 25, 2023 Medically reviewed by Rafle Fernandez, MD Print Table of Contents View All Table of Contents Causes Causes vs. Risk Factors Conditions Medications Blood Pressure Spikes HBP Without Symptoms Blood Pressure Readings Next in Hypertension Guide How Hypertension Is Diagnosed High blood pressure, also known as hypertension, occurs when the force at which your blood pumps through your body is too high. It is measured by systolic and diastolic millimeters of mercury (mm Hg), which is how much pressure your blood puts on your artery walls when the heart contracts and rests. A normal reading is typically 120 over 80 (120/80 mm Hg). People with certain health disorders may be at a higher risk of hypertension and can experience severe headaches, dizziness, chest pain, and more symptoms. Many factors can contribute to risk with high blood pressure, including: AgeWeightPhysical activity levelsGeneticsDiet This article will discuss the various causes of high blood pressure and different risk factors. ljubaphoto / Getty Images What Causes Sudden High Blood Pressure? High blood pressure can be sudden or prolonged. In some cases, the cause of hypertension is unknown. When that happens, it is referred to as primary hypertension. Secondary hypertension occurs with a known cause. In the case of sudden secondary hypertension, there are several possible causes: Acute stressCertain medicationsCaffeine intakeDrug use (cocaine or amphetamines) These causes generally lead to a spike in blood pressure that does not last for a prolonged period. The Caffeine and Blood Pressure Connection Studies have examined whether caffeine raises blood pressure temporarily, but research has been conflicting. The discrepancies in studies show that some people may experience an increase in blood pressure after drinking coffee while others do not. The 14 Best Blood Pressure Monitors to Use At Home, Tested and Reviewed Causes of High Blood Pressure: Different From Risk Factors Many people see the causes of hypertension and risk factors as one and the same, but the two are different. Risk factors are outside elements that can lead to a certain health outcome, whereas causes directly correlate with developing the health disorder. Risk factors associated with developing high blood pressure include: Low or no physical activity Having obesity or being overweight Having diabetes or chronic kidney disease Not eating enough fruits or vegetables Age over 40 Excessive alcohol consumption for ten years or longer High and prolonged stress levels Genetics Overeating salt/too much salt in your diet Smoking cigarettes A diet full of saturated and trans fats Potassium deficiency Risk Factors and You If you fall into any risk factor category, you may be able to make some lifestyle changes to help reduce your blood pressure. Before making any changes, speak to a healthcare provider about how they may affect you and ask about the safest way to lower blood pressure. Can Diabetes Cause High Blood Pressure? Conditions That Cause High Blood Pressure Health conditions can drive secondary high blood pressure. Conditions include: Chronic pain conditions Diabetes Chronic kidney disease or long-term kidney infections Sleep apnea Glomerulonephritis (kidney inflammation) Underactive or overactive thyroid Cushing’s syndrome Acromegaly Lupus Scleroderma Pregnancy Lowering Blood Pressure During Pregnancy High blood pressure during pregnancy can be serious. Because of that, speaking to a healthcare provider and knowing your options for lowering your blood pressure on your own while pregnant is essential. Some possible ways to lower blood pressure during pregnancy include:Staying active as long as your healthcare provider permits itEating a balanced dietLimiting or removing salt from your diet What to Know About High Blood Pressure and Pregnancy Medications That Cause High Blood Pressure Taking certain medications can also drive high blood pressure. Some possible medications known to be associated with hypertension include: Birth control pills Steroids Nonsteroidal anti-inflammatory drugs (NSAIDs) Some over-the-counter (OTC) cough and cold medicines Herbal supplements containing licorice Selective-serotonin-noradrenaline reuptake inhibitors (SSNRIs) antidepressants, such as venlafaxine Should You Stop Taking Medications That Cause High Blood Pressure? Any medication prescribed to you was done so for a reason. Because of that, taking your medication as prescribed is essential unless your healthcare provider tells you otherwise. You will likely be monitored for high blood pressure and other side effects when you begin new medications. Top 9 Vitamins That May Raise Blood Pressure What Causes High Blood Pressure Spikes? A spike in blood pressure occurs when your range reaches 180–200 mm Hg. Several things can lead to spikes in blood pressure, including: Sleep: Some people experience spikes in blood pressure during rapid eye movement (REM) sleep. Diet: Increases in blood pressure can occur after consuming foods high in sugar or salt. Stress: High-stress situations can cause a temporary rise in blood pressure levels. Exercise: During exercise, blood pressure spikes because the body’s demand for oxygen and cardiovascular efforts is heightened. Is a Spike in Blood Pressure Permanent? These instances cause temporary spikes in blood pressure that return to normal after the cause has been eliminated. For example, a spike in blood pressure caused by exercise will return to normal once you stop exercising and your heart rate returns to normal. What Causes High Blood Pressure Without Symptoms? High blood pressure may cause some symptoms to develop. That said, it is often referred to as the “silent killer” because many people do not experience any signs that it's occurring in their bodies. If they do, symptoms can include: Severe headaches Chest pain Dizziness Difficulty breathing Nausea Vomiting Vision changes Anxiety Confusion Buzzing in the ears Nosebleeds Abnormal heart rhythms These symptoms are nonspecific, meaning there can be many causes, making it difficult to determine if you have high blood pressure from these symptoms alone. This is especially true if you have primary or essential hypertension. Essential hypertension develops on its own and is not driven by an underlying health disorder, so symptoms may be even less likely to develop. How Does High Blood Pressure Feel? You may not feel anything when you have high blood pressure, but it can cause damage to the body even if you don’t experience symptoms. That is why it’s vital to get your blood pressure tested regularly and work on eliminating risk factors in your life. How Often Should You Check Your Own Blood Pressure? I Don’t Know What’s Causing My High Blood Pressure If you monitor your blood pressure and see a consistently high level, you should see a healthcare provider. They can help run diagnostic tests and other examinations to determine what may be causing your high blood pressure and routes to lower it to safe levels. Identifying Ideal Blood Pressure Levels Blood pressure levels are measured by systolic and diastolic readings. Systolic is the first number and measures the pressure against an artery wall when the heart squeezes or beats. Diastolic is the second number and is the force of pressure against artery walls when the heart is at rest in between beats. Levels of blood pressure are as follows:Normal: 120 or less systolic and 80 or less diastolicElevated: 120–129 systolic and 80 or less diastolicHypertension stage 1: 130–139 systolic and 80–89 diastolicHypertension stage 2: 140 or higher systolic over 90 or higher diastolicHypertensive crisis (medical emergency): 180 or higher systolic over 120 or higher diastolic 11 Effective Tricks to Lower Your Blood Pressure Instantly Summary High blood pressure can arise for many reasons, including underlying health disorders, medications, or poor lifestyle habits. Because there is a wide array of causes, the only way to tell what is causing your high blood pressure. A medical professional will determine the cause and what you can do about it. High blood pressure can be treated in various ways, but before any therapies can begin, you must know what is causing it. 16 Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Mills KT, Stefanescu A, He J. The global epidemiology of hypertension. Nat Rev Nephrol. 2020 Apr;16(4):223-237. doi:10.1038/s41581-019-0244-2 American Family Physician. Clues that your high blood pressure is due to an underlying and treatable condition. Harvard Health Publishing Harvard Medical School. Coffee and your blood pressure. Alzghoul BN, Abualsuod A, Alqam B, Innabi A, Palagiri DR, Gheith Z, Amer FN, Meena NK, Kenchaiah S. Cocaine use and pulmonary hypertension, Am J Cardiol. 2020 Jan 15;125(2):282-288. doi:10.1016/j.amjcard.2019.10.008 Spruill TM. Chronic psychosocial stress and hypertension. Curr Hypertens Rep. 2010 Feb;12(1):10-6. doi:10.1007/s11906-009-0084-8 Bolívar JJ. Essential hypertension: An approach to its etiology and neurogenic pathophysiology. Int J Hypertens. 2013;2013:547809. doi:10.1155/2013/547809 World Health Organization. Hypertension. Princewel F, Cumber SN, Kimbi JA, Nkfusai CN, Keka EI, Viyoff VZ, Beteck TE, Bede F, Tsoka-Gwegweni JM, Akum EA. Prevalence and risk factors associated with hypertension among adults in a rural setting: the case of Ombe, Cameroon.Pan Afr Med J. 2019 Nov 14;34:147. doi:10.11604/pamj.2019.34.147.17518 Leung AA, Bushnik T, Hennessy D, McAlister FA, Manuel DG. Risk factors for hypertension in Canada. Health Rep. 2019 Feb 20;30(2):3-13. UK National Health Service. Causes: High blood pressure (hypertension). UK National Health Service. High blood pressure (hypertension) and pregnancy. Séi H. Blood pressure surges in REM sleep: A mini review. Pathophysiology. 2012 Sep;19(4):233-41. doi:10.1016/j.pathophys.2012.04.006 He FJ, MacGregor GA. Salt and sugar: Their effects on blood pressure. Pflugers Arch. 2015 Mar;467(3):577-86. doi:10.1007/s00424-014-1677-x American Heart Association. Managing stress to control high blood pressure. Mohammed LLM, Dhavale M, Abdelaal MK, Alam ABMN, Blazin T, Prajapati D, Mostafa JA. Exercise-induced hypertension in healthy individuals and athletes: Is it an alarming sign? Cureus. 2020 Dec 9;12(12):e11988. doi:10.7759/cureus.11988 American Heart Association. Understanding blood pressure readings. By Angelica Bottaro Bottaro has a Bachelor of Science in Psychology and an Advanced Diploma in Journalism. She is based in Canada. See Our Editorial Process Meet Our Medical Expert Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit