Low blood pressure can often be raised through a combination of dietary changes, physical techniques, and hydration strategies. A reading below 90/60 mmHg is generally considered low, but what matters more than the number is whether you’re experiencing symptoms like dizziness, lightheadedness, or fainting. Most cases respond well to lifestyle adjustments, though some people need medication.
Quick Physical Tricks That Work Immediately
When you feel a dizzy spell coming on, specific muscle-tensing movements can raise your systolic blood pressure by roughly 15 mmHg within seconds. These work because contracting your muscles physically compresses the blood vessels inside them, pushing more blood back toward your heart and brain.
The most effective moves include crossing your legs while standing and squeezing your thigh muscles, clenching both fists tightly (hand gripping), tensing your entire lower body (glutes, thighs, and calves simultaneously), and squatting down with your head between your knees if you feel close to fainting. That last position, sometimes called the “crash position,” is your best option when you feel like you might actually pass out. One important detail: don’t hold your breath or bear down while doing these. Straining increases pressure in your chest and actually reduces blood flow to your brain, which is the opposite of what you need.
Combining maneuvers works even better. If you’ve been squatting and need to stand back up, keep tensing your leg muscles as you rise to prevent the blood pressure drop that comes with changing position.
Drink More Water Than You Think
Dehydration is one of the most common and fixable causes of low blood pressure. Your blood is mostly water, so when fluid volume drops, pressure drops with it. The American Heart Association notes that people managing low blood pressure should aim for 2 to 3 liters of fluid per day, which is roughly 8 to 12 cups. That’s more than the standard advice for healthy adults.
Drinking water also has a surprisingly fast effect. Even a single large glass can temporarily improve your body’s ability to tolerate standing upright. Spreading your intake throughout the day is more effective than drinking large amounts at once.
Salt Is Your Friend (for Once)
Unlike people with high blood pressure, you may actually benefit from eating more salt. Sodium helps your body hold onto water, which increases blood volume and raises pressure. Medical guidelines for people with orthostatic disorders (blood pressure that drops when standing) recommend 2,400 to 4,000 mg of sodium per day, and some specialists suggest even higher amounts depending on the severity.
A practical way to gauge whether you need more salt: if your daily sodium intake is below about 3,900 mg, increasing it by even 2,400 mg per day has been shown to improve blood pressure regulation and reduce dizziness within two months. You can add salt to meals, eat salty snacks like pretzels or olives, or use electrolyte drinks. Some people add 1,000 to 2,000 mg of sodium to each of their three daily meals through a combination of food choices and salt tablets.
How You Eat Matters Too
Blood pressure commonly drops after meals, a condition called postprandial hypotension. It happens because your body diverts blood to your digestive system after eating, and sometimes your blood vessels don’t tighten enough elsewhere to compensate. Large meals and high-carbohydrate meals are the biggest triggers.
The fix is straightforward: eat six smaller meals throughout the day instead of three large ones, and keep carbohydrates moderate at each sitting. Choosing meals built around protein, healthy fats, and non-starchy vegetables causes less of a blood pressure dip than a big plate of pasta or rice. If you notice you feel especially dizzy or lightheaded 30 to 60 minutes after eating, postprandial hypotension is likely the cause.
Compression Garments Push Blood Upward
When you’re upright, gravity pulls blood into your legs and abdomen. Compression stockings and abdominal binders counteract this by physically squeezing those areas and pushing blood back toward your heart. Johns Hopkins Medicine recommends starting with stockings rated at 20 to 30 mmHg of pressure. If that feels too tight or hard to get on, drop to 15 to 20 mmHg. If it doesn’t feel like enough, move up to 30 to 40 mmHg.
Waist-high stockings outperform knee-high ones because they cover more territory where blood pools. The best results come from combining waist-high compression with an abdominal compression garment (like shapewear or a compression vest), which prevents blood from settling in both the legs and abdomen at the same time. These are especially helpful if your symptoms are worst in the morning or after long periods of standing.
Medications for Persistent Cases
When lifestyle changes aren’t enough, two medications are commonly prescribed. The first works by tightening blood vessels directly, giving them more squeeze so blood pressure stays up. It’s taken three times a day and your doctor will typically start at a low dose and increase it based on your response. The second is a synthetic hormone that helps your kidneys retain sodium, which increases blood volume. It also makes your blood vessels more responsive to tightening signals. This one is taken once daily.
Both require medical supervision because they need dose adjustments over time and can cause side effects like high blood pressure when lying down. Medication is generally reserved for people whose symptoms significantly affect daily life and haven’t responded to the strategies above.
Other Habits That Help
Several smaller adjustments can add up. Sleep with the head of your bed elevated a few inches, which trains your body to retain more fluid overnight. Rise slowly from bed or chairs, giving your cardiovascular system time to adjust. Avoid standing still for long periods; if you have to, shift your weight, rock on your heels, or flex your calf muscles regularly. Avoid alcohol, which dilates blood vessels and lowers pressure further. Hot environments, including hot showers and baths, also drop blood pressure, so keep water temperature moderate.
Review your medications with your doctor if low blood pressure is a new problem. Blood pressure drugs, certain antidepressants, and prostate medications are common culprits. Sometimes a dose adjustment or timing change is all it takes.
Signs of a Dangerous Drop
Most low blood pressure is uncomfortable but not dangerous. However, a sudden drop of just 20 mmHg can cause fainting, and large sudden drops can be life-threatening. Call emergency services if you or someone else develops confusion (especially in older adults), cold and clammy skin, noticeably pale skin, rapid shallow breathing, or a weak and rapid pulse. These are signs of shock, which means organs aren’t getting enough blood flow. Shock can result from severe bleeding, serious infections, or severe allergic reactions, and it requires immediate medical treatment.