Many things raise your blood pressure, from what you eat and drink to how you sleep, how stressed you are, and even what medications you take. Some factors cause a temporary spike that resolves in hours, while others push your numbers up gradually over months or years. Normal blood pressure is below 120/80 mmHg. Stage 1 hypertension starts at 130/80, and stage 2 begins at 140/90, based on the 2025 guidelines from the American Heart Association.
Sodium and Potassium Imbalance
Sodium is the single most talked-about dietary driver of high blood pressure, and for good reason. When you eat a lot of salt, your body holds onto extra fluid to keep sodium concentrations balanced in your blood. That additional fluid increases the volume of blood your heart has to pump, which raises the pressure inside your arteries. Your body also stores excess sodium in your skin tissue, creating pockets of high salt concentration that may influence blood pressure through mechanisms researchers are still mapping out.
What matters just as much is the balance between sodium and potassium. Potassium helps your body release sodium through urine and relaxes the walls of your blood vessels. Most Americans eat too much sodium and too little potassium, which tilts that balance in the wrong direction. Loading up on fruits, vegetables, beans, and dairy (all rich in potassium) while cutting back on processed and packaged foods is one of the most effective dietary shifts you can make. The DASH eating plan, designed specifically to lower blood pressure, is built around this principle.
Added Sugar and Fructose
Salt gets most of the attention, but added sugar, particularly fructose, also raises blood pressure. When your body breaks down fructose, it produces uric acid as a byproduct. Uric acid interferes with nitric oxide, a molecule your blood vessels rely on to stay relaxed and open. With less nitric oxide available, vessels stiffen and narrow, and pressure rises. Sugary drinks, candy, and foods with high-fructose corn syrup are the main sources of excess fructose in most diets.
Alcohol
Alcohol raises blood pressure in a direct, dose-dependent way. A large meta-analysis of cohort studies found that people who drank the equivalent of about one standard drink per day (12 grams of alcohol) had systolic blood pressure roughly 1.25 mmHg higher than nondrinkers. At two drinks a day, the increase was about 2.5 mmHg. At four drinks a day, systolic pressure was nearly 5 mmHg higher and diastolic pressure about 3 mmHg higher. For systolic pressure, there was no safe threshold: the relationship was linear from the very first drink upward.
Caffeine
Caffeine causes a noticeable but temporary blood pressure spike. Within about 45 to 60 minutes of drinking coffee or taking a caffeine pill, both systolic and diastolic readings climb. The size of the spike varies from person to person, but people who already have high blood pressure tend to see a larger jump, sometimes more than 1.5 times the increase seen in people with normal readings. If you’re monitoring your blood pressure at home, avoid caffeine for at least 30 minutes before taking a reading so you get an accurate number.
Stress and the Fight-or-Flight Response
When you feel threatened or under pressure, your adrenal glands release adrenaline (epinephrine) and norepinephrine. These hormones increase your heart rate and the force of each heartbeat while squeezing your blood vessels tighter. The result is a rapid rise in blood pressure that gives your muscles and brain more blood flow to handle the situation. This is useful in a genuine emergency but becomes a problem when stress is chronic: repeated surges keep your cardiovascular system on high alert and can contribute to sustained high blood pressure over time. Cortisol, another stress hormone, reinforces the effect by helping your body hold onto sodium and fluid.
Poor Sleep and Sleep Apnea
Sleep is when your blood pressure normally dips to its lowest point. If you’re not sleeping well, or not sleeping enough, you miss that nightly reset. Obstructive sleep apnea is especially harmful. During an apnea episode, your airway collapses and oxygen levels drop repeatedly throughout the night. Each drop triggers your sympathetic nervous system, the same system that activates during stress, flooding your body with catecholamines that raise heart rate and constrict blood vessels. Over time, these nightly surges cause structural changes in the brain regions that control blood pressure, so the effect persists even during the daytime. People with untreated sleep apnea often have blood pressure that is stubbornly high and resistant to medication.
Physical Inactivity
A sedentary lifestyle raises blood pressure partly by allowing your arteries to stiffen. Arteries are meant to stretch and recoil with each heartbeat, but without regular physical activity, they lose that elasticity. Research on older adults found that those who spent more time doing even light physical activity (not necessarily vigorous exercise) had measurably more flexible arteries than their less active peers. The difference in arterial stiffness between the most and least active groups was significant enough to matter clinically.
Exercise helps keep arteries supple through several pathways: it boosts nitric oxide production, which relaxes vessel walls, and it may reduce the buildup of stiff collagen cross-links in arterial tissue. You don’t need to run marathons. Walking, gardening, and other light activities done consistently throughout the day provide real benefits.
Nicotine and Smoking
Every cigarette causes an immediate spike in both blood pressure and heart rate. Nicotine stimulates the release of adrenaline, which constricts blood vessels and forces the heart to work harder. While some large surveys of single office readings have found that smokers and nonsmokers have similar resting blood pressure, studies using 24-hour ambulatory monitors tell a different story: long-term smokers have higher average blood pressure and heart rate throughout the entire day. Chronic nicotine exposure also causes structural changes to the heart, including thickening of the right ventricular wall. Vaping and other nicotine delivery methods produce similar acute effects.
Medications and Supplements
Several common medications can raise your blood pressure, sometimes enough to push you from a normal range into hypertension territory. The most widely used culprits include:
- Pain relievers (NSAIDs): Ibuprofen (Advil, Motrin) and naproxen (Aleve) cause your body to retain sodium and fluid. Regular use can meaningfully raise your readings.
- Decongestants: Pseudoephedrine and phenylephrine, found in many cold and sinus products, work by narrowing blood vessels in your nasal passages but also narrow them elsewhere in your body.
- Hormonal birth control: Birth control pills and some hormonal devices raise blood pressure in some people.
- Antidepressants: Several classes, including SSRIs, tricyclics, and MAO inhibitors, can increase blood pressure.
- ADHD stimulants: Medications like methylphenidate (Ritalin, Concerta) raise both heart rate and blood pressure.
- Herbal supplements: Licorice root, ginseng, guarana, and ephedra (ma-huang) can all push blood pressure higher.
If you take any of these regularly and your blood pressure is creeping up, the medication could be a contributing factor worth discussing with your provider.
Recreational Drugs
Cocaine, amphetamines (including methamphetamine), and ecstasy (MDMA) all cause sharp, dangerous spikes in blood pressure. These drugs flood the body with stimulating chemicals that increase heart rate and constrict blood vessels simultaneously. The combination can push blood pressure to levels that cause strokes or heart attacks, even in young, otherwise healthy people.
Cold Weather
Blood pressure tends to be higher in winter and lower in summer. Cold temperatures cause blood vessels to narrow temporarily, which means the heart has to push harder to move the same amount of blood. If you monitor your blood pressure at home, you may notice readings that are consistently a few points higher during the colder months. This is normal, but for people already near the threshold of hypertension, the seasonal shift can be enough to tip readings into a higher category.
Excess Body Weight
Carrying extra weight forces your heart to pump more blood to supply the additional tissue. That increased cardiac output raises the pressure on your artery walls. Fat tissue also produces hormones and inflammatory signals that stiffen blood vessels and promote sodium retention. Losing even a modest amount of weight, around 5 to 10 percent of your body weight, typically produces a measurable drop in blood pressure.