If your blood pressure is running low, several practical strategies can bring it up, from drinking more water and adding salt to your diet to wearing compression garments and changing how you position your body. Low blood pressure is generally defined as a reading below 90/60 mmHg, and while it’s harmless for many people, it can cause dizziness, fainting, and fatigue when it drops too far.
Drink More Water
Water is one of the fastest, simplest ways to raise blood pressure. Interestingly, the mechanism isn’t what most people assume. Drinking water doesn’t raise blood pressure by increasing the volume of fluid in your bloodstream. Research published in Circulation found that plasma volume didn’t actually change after water drinking. Instead, water triggers a rapid increase in sympathetic nervous system activity, the same “fight or flight” system activated by caffeine and nicotine. This boost in nervous system activity tightens blood vessels and pushes pressure up, particularly in older adults and people with autonomic disorders.
Aim for consistent hydration throughout the day rather than large amounts at once. Keeping a water bottle nearby and sipping regularly helps maintain steady blood volume and prevents the dehydration that worsens low blood pressure.
Increase Your Salt Intake
Salt holds water in the bloodstream, which directly raises blood volume and, with it, blood pressure. For people with orthostatic hypotension (blood pressure that drops when standing), medical guidelines recommend significantly more sodium than the average diet provides. Recommendations from major cardiovascular societies range from about 2,400 to 4,800 mg of sodium per day, and some specialists suggest even higher amounts of 4,000 to 8,000 mg for certain patients.
For context, the typical American already consumes around 3,400 mg of sodium daily, so the increase might be modest. Practical ways to add sodium include salting your food more liberally, eating broth-based soups, snacking on salted nuts or pretzels, or using electrolyte drinks. If you have kidney disease or heart failure, extra salt can be harmful, so this approach isn’t for everyone.
Physical Counter-Pressure Maneuvers
When you feel lightheaded or sense your blood pressure dropping, specific physical movements can raise it within seconds by squeezing blood from your legs and abdomen back toward your heart. The American Heart Association recommends several techniques:
- Leg crossing and tensing: Cross your legs while standing or lying down and simultaneously tighten your leg, abdominal, and buttock muscles.
- Squatting: Lower yourself into a squat, tensing your lower body and abdomen. Stay down until symptoms pass, then stand slowly.
- Hand gripping: Grip your hands together, interlocking your fingers, and pull your arms in opposite directions as hard as you can.
- Fist clenching: Squeeze your fist as tightly as possible, with or without an object in your hand.
These maneuvers are especially useful in situations where you can’t sit down right away, like standing in line or getting up from a chair. They won’t fix the underlying problem, but they can prevent a faint.
Wear Compression Garments
Compression stockings and abdominal binders work by preventing blood from pooling in your legs and abdomen when you stand. Gravity pulls blood downward, and if your body can’t compensate quickly enough, your blood pressure drops. Compression physically pushes that blood back into circulation.
Most specialists recommend waist-high compression stockings rated at 20 to 30 mmHg or 30 to 40 mmHg. Knee-high stockings are easier to put on but less effective because so much blood pools in the thighs and pelvis. Abdominal binders can be used alone or combined with stockings for an added boost. The garments work best when put on before getting out of bed in the morning, before gravity has a chance to pull blood downward.
Adjust How You Sleep
Sleeping with the head of your bed slightly elevated, rather than flat, can improve your blood pressure tolerance during the day. This technique has been used by clinicians since the 1940s. Raising the head end by about 6 inches (roughly 5 to 10 degrees) reduces overnight fluid loss through urine and helps your body maintain better blood volume by morning. Studies on patients with fainting episodes found that sleeping at a 10-degree tilt for three to four months measurably improved their ability to tolerate standing upright.
You can achieve this by placing bed risers or sturdy blocks under the legs at the head of your bed. Stacking pillows doesn’t provide the same effect because it bends your body at the waist rather than tilting you as a whole.
Eat Smaller, More Frequent Meals
Blood pressure commonly drops after eating because your body diverts blood flow to the digestive system. Larger meals cause larger drops. This postprandial hypotension is especially common in older adults and can cause dizziness or fainting within 30 to 60 minutes of a meal.
Eating six smaller meals instead of three large ones reduces the amount of blood diverted to digestion at any one time. Keeping carbohydrate content lower at each meal also helps, since carbohydrates trigger the biggest blood pressure drops. Pairing carbs with protein and fat slows digestion and blunts the effect.
Other Lifestyle Strategies
Several smaller habits add up when you’re trying to keep your blood pressure from bottoming out. Standing up slowly, especially first thing in the morning, gives your cardiovascular system time to adjust. Sitting on the edge of the bed for a minute before standing can make a noticeable difference. Avoiding alcohol helps, since it dilates blood vessels and lowers pressure further. Caffeinated drinks can provide a temporary boost by stimulating the same sympathetic nervous system pathway that water activates, though the effect fades with regular use.
When Lifestyle Changes Aren’t Enough
If you’ve tried these approaches and still feel dizzy, lightheaded, or faint regularly, prescription medications can help. The two most commonly used work through different mechanisms. One type tightens blood vessels directly, raising pressure in much the same way that squeezing a garden hose increases water pressure. The other promotes salt and water retention, expanding blood volume over time. Both require monitoring because they can push blood pressure too high, especially when you’re lying down.
Persistent low blood pressure can also be a sign of an underlying condition, including dehydration, heart problems, endocrine disorders, or nervous system dysfunction. If your symptoms are new, worsening, or accompanied by confusion, rapid breathing, or cold and clammy skin, that warrants prompt medical evaluation rather than home management.