Dozens of everyday factors can raise your blood pressure, from the food you eat to medications you might not think twice about taking. Some causes are temporary, pushing your numbers up for hours before settling back down. Others create a steady, sustained increase that puts long-term strain on your heart and blood vessels. Understanding both types helps you identify what might be driving your own readings higher.
For reference, normal blood pressure sits below 120/80 mm Hg. Stage 1 hypertension starts at 130/80, and stage 2 begins at 140/90.
Sodium and Diet
Salt is the single most discussed dietary driver of high blood pressure, and for good reason. When you take in more sodium than your body needs, your body holds on to extra water to dilute it. That increases the volume of fluid inside your blood vessels, which raises the pressure against vessel walls and forces your heart to work harder. The average American eats about 1½ teaspoons of salt per day, roughly 50% more than the recommended limit.
Most of this sodium doesn’t come from a salt shaker. It’s built into processed foods, restaurant meals, canned soups, deli meats, frozen dinners, and condiments like soy sauce. Bread, cheese, and pizza are among the top contributors simply because people eat them so often. Cutting back on these sources tends to produce a noticeable drop in blood pressure within a few weeks, particularly if your readings are already elevated.
Low potassium intake compounds the problem. Potassium helps your kidneys flush out sodium, so a diet low in fruits, vegetables, and beans makes it harder for your body to maintain balance. The two work as a pair: high sodium plus low potassium is a more powerful predictor of hypertension than either one alone.
Alcohol
Alcohol raises blood pressure in a dose-dependent way, meaning more drinks equal higher risk. A large meta-analysis found the relationship is nearly linear: at about two standard drinks per day (24 grams of alcohol), hypertension risk rises by roughly 11% compared to one drink per day. At three drinks daily, risk climbs 22%, and at four drinks it reaches 33%. For women, the association appears to kick in above one drink per day, though at higher intake levels, women’s risk rises more steeply than men’s.
Even a single episode of heavy drinking can spike your blood pressure temporarily. Chronic heavy drinking, however, creates sustained elevations that may not fully reverse even after you cut back, depending on how long the pattern lasted.
Excess Weight and Inactivity
Carrying extra weight raises blood pressure through several overlapping mechanisms. More body tissue means more blood vessels, which means your heart has to pump a greater volume of blood. Fat tissue also produces hormones and inflammatory signals that stiffen arteries and promote fluid retention. Abdominal fat is especially problematic because it surrounds organs involved in blood pressure regulation, including the kidneys.
Physical inactivity contributes independently. A sedentary lifestyle keeps your resting heart rate higher and your blood vessels less flexible. Regular aerobic exercise, even moderate-intensity walking, improves the ability of your arteries to expand and contract, which directly lowers pressure. The effect is significant enough that consistent exercise can reduce systolic blood pressure by 5 to 8 points in people with hypertension.
Stress and the “White Coat” Effect
Acute stress triggers your nervous system to release hormones that temporarily speed up your heart and tighten blood vessels. This is normal and short-lived. But chronic stress, whether from work, finances, caregiving, or sleep deprivation, keeps that system activated at a low hum, nudging blood pressure upward over time. Stress also drives behaviors that raise blood pressure indirectly: overeating, drinking more, sleeping less, and skipping exercise.
One well-documented example of stress-related spikes is the “white coat effect,” where blood pressure rises simply because you’re in a medical setting. The average increase is striking: about 27 mm Hg on the systolic (top) number. That’s enough to push a perfectly normal reading into stage 2 hypertension range during an office visit. If your readings are consistently high only at the doctor’s office, home monitoring can help distinguish white coat hypertension from the real thing.
Common Medications and Supplements
Several medications that seem unrelated to blood pressure can raise it substantially. Pain relievers in the NSAID category (ibuprofen, naproxen) are among the most common culprits. They work by blocking the production of certain protective compounds in your kidneys. Those compounds normally help keep blood flowing through the kidneys and promote sodium excretion. When they’re suppressed, your kidneys retain more sodium and fluid, and blood pressure climbs. This effect reaches its peak after about 3 to 7 days of regular use.
Decongestants are another frequent offender. Pseudoephedrine, phenylephrine, and oxymetazoline (the active ingredient in many nasal sprays) all work by narrowing blood vessels to reduce swelling in your nasal passages. That same vessel-narrowing effect raises blood pressure throughout the body. If you already have elevated blood pressure, these ingredients can push it significantly higher.
Other medications that can raise blood pressure include:
- Oral contraceptives: Estrogen-containing birth control pills cause hypertension in roughly 5% of users, particularly with higher-dose formulations
- Stimulant medications used for ADHD
- Certain antidepressants, especially those that affect norepinephrine
- Corticosteroids like prednisone, which cause sodium and fluid retention
- Herbal supplements containing licorice root, ephedra, or ginseng
Caffeine
Caffeine causes a short-term spike in blood pressure, typically within 30 to 60 minutes of consumption. The increase is usually around 5 to 10 mm Hg systolic and tends to be more pronounced in people who don’t drink caffeine regularly. Habitual coffee drinkers develop some tolerance to this effect, though it doesn’t disappear entirely. If you’re checking your blood pressure at home, avoid caffeine for at least 30 minutes beforehand to get an accurate reading.
Sleep Apnea
Obstructive sleep apnea is one of the most underrecognized causes of high blood pressure. During sleep, the airway repeatedly collapses, cutting off oxygen for seconds at a time. Each episode triggers a surge of stress hormones that spike blood pressure and jolt the heart. Over months and years, this nightly cycle of oxygen deprivation and recovery remodels how the nervous system regulates blood pressure during waking hours too.
The connection is especially strong in people whose blood pressure doesn’t respond well to medication. Among patients with resistant hypertension (blood pressure that stays high despite three or more medications), sleep apnea is present in over 80%. In those with truly refractory hypertension, the prevalence approaches 100%. Treating sleep apnea, typically with a CPAP machine, often brings blood pressure down in ways that additional medications could not.
Kidney Problems
Your kidneys are central to blood pressure control because they regulate how much sodium and fluid your body retains. When blood flow to a kidney is restricted, as happens with narrowing of the renal arteries, the affected kidney essentially panics. It interprets the reduced flow as a sign that blood pressure is too low and activates a hormonal cascade that constricts blood vessels throughout the body and signals the kidneys to hold on to more salt and water. The result is blood pressure that rises and stays elevated.
Chronic kidney disease from any cause, whether diabetes, longstanding hypertension, or other conditions, impairs the kidney’s ability to excrete sodium normally. This creates a feedback loop: damaged kidneys raise blood pressure, and high blood pressure damages kidneys further.
Smoking and Nicotine
Every cigarette causes an immediate, temporary rise in blood pressure that lasts about 20 to 30 minutes. Nicotine stimulates the release of adrenaline, which speeds up the heart and tightens blood vessels. Over time, smoking also damages the inner lining of arteries, making them stiffer and less able to accommodate changes in blood flow. This stiffening contributes to sustained blood pressure increases. Vaping and nicotine pouches produce similar acute effects because nicotine itself is the primary driver.
Age, Genetics, and Other Fixed Factors
Some contributors to high blood pressure aren’t things you can change. Arteries naturally lose flexibility with age, which is why systolic blood pressure tends to rise steadily after age 40. Family history plays a significant role: if one or both of your parents developed hypertension, your own risk is substantially higher. Black Americans face a disproportionately high prevalence of hypertension, with earlier onset and more severe outcomes on average, driven by a combination of genetic, environmental, and socioeconomic factors.
Thyroid disorders, adrenal gland tumors, and hormonal conditions like Cushing’s syndrome can also drive blood pressure up. These are less common but worth investigating if your blood pressure is high and doesn’t have an obvious explanation, especially if it developed suddenly or at a young age.