Low blood pressure, defined as a reading below 90/60 mmHg, can be raised through a combination of dietary changes, physical techniques, and lifestyle adjustments. Most people with mild low blood pressure can see meaningful improvement without medication by increasing salt and fluid intake, using simple muscle-tensing maneuvers, and making changes to how and when they eat.
Increase Your Salt Intake
Salt is one of the most effective tools for raising blood pressure because sodium helps your body hold onto water, which increases blood volume. For people with orthostatic hypotension (the kind where your blood pressure drops when you stand up), medical guidelines recommend significantly more sodium than the general population typically consumes. The American Society of Hypertension suggests 2,400 to 4,000 mg of sodium per day for these patients, while some specialists recommend up to 4,000 to 8,000 mg daily depending on severity.
A practical approach is to add 1,000 to 2,000 mg of sodium to your diet three times per day. One study found that patients who added roughly 2,400 mg of sodium daily for two months showed improved ability to tolerate standing, better blood vessel function, and more stable blood flow to the brain. You can increase sodium through saltier foods like broth, olives, pickles, and cheese, or by simply salting your meals more generously. Electrolyte drinks and salt tablets are other options if you find it hard to eat enough salt through food alone.
Drink More Water, and Drink It Quickly
Hydration matters for blood pressure, but the way you drink water matters too. Research published in Circulation found that drinking about 16 ounces (480 mL) of water raised seated blood pressure by 11 mmHg in older adults and by a striking 43 mmHg in patients with autonomic failure. Drinking that full amount produced a stronger effect than drinking half as much. The mechanism isn’t simply about expanding blood volume. Drinking water rapidly triggers a spike in sympathetic nervous system activity, the same system responsible for your “fight or flight” response, which tightens blood vessels and pushes pressure up.
Aim for 2 to 3 liters of fluid per day as a baseline. If you feel lightheaded or dizzy, drinking a full glass of water relatively quickly can provide a short-term boost while you address the underlying issue.
Physical Maneuvers That Work Immediately
When you feel symptoms of low blood pressure coming on, such as lightheadedness or tunnel vision, specific muscle-tensing techniques can raise your blood pressure within seconds. These work by squeezing blood from your muscles back toward your heart, temporarily increasing the volume of blood your heart pumps out.
- Arm tensing: Grip one hand with the other and pull them against each other without letting go. Hold as long as you can or until symptoms pass.
- Leg crossing: Cross one leg over the other and squeeze the muscles in your legs, abdomen, and buttocks simultaneously. Maintain the position until you feel better.
- Handgrip: Squeeze a rubber ball (or any firm object) in your dominant hand for as long as you can or until symptoms disappear.
These counterpressure techniques, recommended by Cleveland Clinic for patients prone to fainting, are especially useful when you need to stay upright in situations like standing in line or riding public transit. They’re a bridge, not a cure, but they can prevent a faint.
Eat Smaller, Lower-Carb Meals
Blood pressure naturally dips after eating because your body diverts blood to your digestive system. For people already running low, this post-meal drop can cause dizziness, fatigue, or even fainting. The larger and more carbohydrate-heavy the meal, the bigger the drop tends to be.
Switching from three large meals to six smaller ones throughout the day keeps the post-meal blood pressure dip from becoming significant. Reducing the carbohydrate load of each meal also helps, since carbs trigger the strongest digestive blood flow response. Prioritizing protein, healthy fats, and non-starchy vegetables at each meal keeps your energy stable without pulling as much blood away from your brain.
Caffeine as a Short-Term Boost
Caffeine constricts blood vessels and can raise blood pressure by about 5 to 10 points, particularly if you don’t drink it regularly. The effect kicks in within 30 minutes and can last up to two hours. A cup of coffee or tea before situations where you know your blood pressure tends to drop (like after meals or before prolonged standing) can be a useful strategy. If you’re a daily coffee drinker, you’ve likely built up tolerance and won’t see as much of a bump.
Compression Garments
Waist-high compression stockings reduce the amount of blood that pools in your legs when you stand, keeping more of it circulating to your brain and vital organs. The Mayo Clinic specifically recommends waist-high rather than knee-high stockings for orthostatic hypotension, since thigh-length and shorter versions don’t capture enough of the lower body’s blood volume to make a meaningful difference. Wear them during the day and remove them when you lie down for sleep.
Abdominal binders serve a similar purpose by compressing the large blood vessels in your core. Some people find combining both provides the best symptom control, particularly during long periods of standing or walking.
When Lifestyle Changes Aren’t Enough
If dietary and behavioral strategies don’t bring your blood pressure into a comfortable range, prescription medication is an option. The most commonly prescribed drug for chronic low blood pressure works by tightening blood vessels throughout the body, raising both standing and resting pressure. It’s taken two to three times daily because of its short duration of action, and it can cause side effects like scalp tingling, goosebumps, and urinary urgency. The most important risk to monitor is that it can push blood pressure too high when you’re lying down, so timing doses around your daily routine matters.
Another class of medication helps your kidneys retain sodium, which expands blood volume over time. Your doctor will typically try lifestyle modifications first and add medication only when symptoms interfere with daily functioning or put you at risk for falls and injury.
Positional Habits That Help
How you move through your day can significantly reduce symptoms. Stand up slowly, especially first thing in the morning or after sitting for a long time. Sitting on the edge of the bed for 30 to 60 seconds before standing gives your cardiovascular system time to adjust. Sleeping with the head of your bed elevated by a few inches (using bed risers, not extra pillows) trains your body to retain more fluid overnight, which reduces the morning blood pressure drop that many people with hypotension experience.
Avoid standing still for long stretches. If you have to, shift your weight, rise on your toes, or use the leg-crossing technique described above. Moving your calf muscles acts as a pump that pushes blood back up toward your heart, counteracting gravity’s pull on your circulation.