Dozens of everyday factors can raise your blood pressure, from the food you eat to the medications in your cabinet to how many hours you spend sitting. Some cause temporary spikes that resolve in hours, while others push your baseline pressure upward over months and years. Understanding which ones apply to you is the first step toward keeping your numbers in a healthy range.
Sodium and Added Sugars
Salt is the most well-known dietary driver of high blood pressure, and for good reason. Sodium pulls water into your bloodstream, increasing the total volume of fluid your heart has to pump. The federal guideline is to stay under 2,300 mg of sodium per day, but the average American consumes over 3,400 mg daily. Most of that excess comes not from the salt shaker but from processed foods, restaurant meals, canned soups, deli meats, and packaged snacks.
Added sugars, particularly fructose, are a less obvious culprit. When your body breaks down fructose, it generates uric acid, which interferes with nitric oxide, a molecule that relaxes and widens blood vessels. With less nitric oxide available, your vessels stay tighter, resistance to blood flow increases, and pressure rises. Fructose also promotes salt and water retention in the kidneys and makes the body more sensitive to hormones that constrict blood vessels. The combination of a high-salt, high-sugar diet is especially problematic because fructose blocks the kidney’s normal ability to compensate for excess sodium.
Alcohol, Even in Small Amounts
A large meta-analysis published in the American Heart Association’s journal Hypertension found a linear relationship between alcohol and blood pressure with no safe threshold. Even one standard drink per day (about 12 grams of alcohol) was associated with systolic blood pressure 1.25 mmHg higher than in nondrinkers. That may sound small, but across an entire population it translates to a meaningful increase in heart attacks and strokes.
The effect scales with intake. Two drinks a day corresponded to systolic pressure about 2.5 mmHg higher, and four drinks a day nearly 5 mmHg higher. These are averages, so individual responses vary, but the pattern is consistent: more alcohol means higher pressure, with no amount that’s clearly protective.
Caffeine
Caffeine can raise blood pressure by roughly 5 to 10 points in people who don’t drink it regularly. The spike typically begins within 30 minutes and can last up to two hours. If you’re a daily coffee drinker, your body builds some tolerance to this effect, though it doesn’t disappear entirely for everyone. The simplest way to check your own sensitivity is to measure your blood pressure before a cup of coffee and again about an hour later.
Stress and the Cortisol Response
When you’re stressed, anxious, or sleep-deprived, your body releases cortisol and adrenaline. These hormones raise blood pressure through several overlapping pathways. Cortisol suppresses nitric oxide production, the same vessel-relaxing molecule that fructose disrupts. It also increases cardiac output and stimulates production of a compound called erythropoietin, which has direct vessel-constricting effects. In studies, higher cortisol levels correlated with higher systolic blood pressure and lower concentrations of nitric oxide byproducts in the blood.
A single stressful event causes a temporary spike. Chronic stress, where cortisol stays elevated for weeks or months, can push blood pressure up and keep it there. This is one reason why people under ongoing work pressure, financial strain, or caregiving burden often see their numbers climb even when their diet hasn’t changed.
Common Over-the-Counter Medications
Several medications you can buy without a prescription raise blood pressure, and many people take them without realizing the effect.
- Decongestants like pseudoephedrine and phenylephrine work by narrowing blood vessels in your nasal passages. The problem is they narrow blood vessels everywhere else too, making it harder for blood to flow and increasing pressure. These are found in many cold, flu, and sinus products.
- NSAIDs like ibuprofen (Advil, Motrin) and naproxen (Aleve) can raise blood pressure by causing sodium and water retention. Occasional use is less concerning, but regular use, especially for chronic pain, can meaningfully shift your numbers upward.
It’s also worth checking medication labels for sodium content. Some effervescent tablets and liquid formulations contain surprisingly high amounts of sodium as an inactive ingredient.
Sitting Too Much
Sedentary behavior raises blood pressure independently of whether you exercise. A meta-analysis found that each additional hour of daily sitting was associated with a 2% increase in the odds of developing hypertension. The blood pressure changes per hour are small on their own (fractions of a mmHg), but they add up across a full day of desk work, commuting, and evening screen time. Someone who sits 10 to 12 hours a day accumulates a meaningful disadvantage compared to someone who breaks up sitting with regular movement.
This doesn’t mean you need an intense workout to counteract it. Simply standing, walking for a few minutes, or stretching every 30 to 60 minutes helps your blood vessels stay responsive and prevents the stiffness that comes with prolonged inactivity.
Sleep Apnea
Obstructive sleep apnea is one of the most underdiagnosed causes of high blood pressure. When your airway repeatedly collapses during sleep, oxygen levels drop, and your nervous system responds by flooding the body with stress hormones and constricting blood vessels. This happens dozens or even hundreds of times per night in severe cases.
The link between sleep apnea and hypertension is strikingly strong. In studies of people with resistant hypertension (blood pressure that stays high despite multiple medications), sleep apnea was present in roughly 82% to 100% of patients. If your blood pressure is difficult to control and you snore heavily, wake up tired, or have been told you stop breathing in your sleep, untreated sleep apnea may be the reason your medications aren’t working well enough.
Licorice (the Real Kind)
Natural licorice, the kind made from licorice root, contains a compound called glycyrrhizic acid that interferes with an enzyme in the kidneys responsible for regulating fluid balance. It suppresses the hormones renin and aldosterone, which leads to water retention and increased blood volume. Research from Linköping University found that even small amounts of real licorice raised blood pressure, and the most sensitive individuals also gained weight from fluid retention.
This applies to natural licorice root products, certain herbal teas, and some European-style candies. Most licorice-flavored candy sold in the United States is artificially flavored and doesn’t contain glycyrrhizic acid. If you’re not sure, check the ingredient list for “licorice extract” or “glycyrrhiza.”
The Compounding Effect
What makes blood pressure tricky is that these factors don’t exist in isolation. A person who eats a high-sodium diet, sits for most of the day, takes ibuprofen for back pain, and drinks two beers each evening is stacking multiple pressures on the same system. Each one alone might seem minor, but together they can push blood pressure from normal into a concerning range. Identifying which factors apply to your life, and addressing even two or three of them, often produces a larger drop in blood pressure than any single change would on its own.