Low blood pressure, or hypotension, can be raised through a combination of dietary changes, hydration, physical techniques, and sometimes medication. The right approach depends on whether your blood pressure drops are occasional or chronic, and whether they happen when you stand up, after meals, or throughout the day. Most people can make a noticeable difference with simple adjustments before ever needing medication.
Clinically, orthostatic hypotension is defined as a drop of 20 mmHg or more in systolic pressure (the top number) or 10 mmHg in diastolic pressure (the bottom number) within three minutes of standing up. But you don’t need a formal diagnosis to benefit from the strategies below if you regularly feel lightheaded, dizzy, or faint.
Increase Your Salt and Fluid Intake
Salt is one of the most effective tools for raising blood pressure because sodium pulls water into your bloodstream, expanding your blood volume. For people with chronically low blood pressure, clinical guidelines recommend 6 to 10 grams of sodium chloride per day, which is significantly more than the 2,300 mg (about 5.75 grams) limit typically advised for the general population. This isn’t a green light to eat unlimited processed food, but rather a deliberate increase through salting meals, drinking broth, or eating salty snacks like olives and pickles.
Salt only works if you’re also drinking enough water. The National Academies of Science, Engineering and Medicine recommends about 125 ounces (3.7 liters) of fluid daily for men and 91 ounces (2.7 liters) for women. If you’re physically active, live in a hot climate, or take diuretics, you likely need more. Dehydration directly reduces blood volume, which makes your heart pump against less resistance and lowers your pressure. Pairing increased salt with consistent hydration gives your body the raw materials it needs to keep your blood volume up.
Physical Techniques That Work Immediately
If you feel a drop coming on, especially when standing up, specific body movements can raise your blood pressure within seconds. These are called counter-pressure maneuvers, and they work by squeezing large muscle groups to push blood back toward your heart and brain.
The most effective options:
- Squatting: The fastest rescue move. It compresses the large blood vessels in your legs and immediately raises pressure. If you feel faint, squat down right where you are.
- Crossing your legs and tensing: While standing, cross one leg in front of the other and squeeze your thigh and abdominal muscles. In people prone to fainting, this produced some of the largest blood pressure increases of any maneuver studied.
- Upper body tensing: Grip one hand with the other and pull outward, or squeeze a rubber ball hard. Arm tensing consistently raises systolic pressure in studies.
A combined analysis of over 600 participants found that these maneuvers raised systolic blood pressure by an average of nearly 15 mmHg. That’s enough to prevent a faint or get you through a dizzy spell while your body adjusts. These techniques are particularly useful during blood draws, vaccinations, or any situation where you know your blood pressure tends to drop.
Adjust How and When You Eat
Blood pressure commonly drops after eating because your body diverts blood flow to your digestive system. Normally, your heart rate increases and blood vessels elsewhere tighten to compensate. When that compensation fails, you get postprandial hypotension, which is especially common in older adults.
The fix is straightforward: eat smaller, more frequent meals. Six smaller meals throughout the day put less demand on your circulatory system than three large ones. Cutting back on carbohydrates at each meal also helps, since high-carb meals tend to cause larger blood pressure drops. A cup of coffee with a meal can provide a short-term boost as well, since caffeine temporarily raises blood pressure by about 5 to 10 mmHg in people who don’t drink it regularly. The effect kicks in within 30 minutes and can last up to two hours.
Check for Nutritional Deficiencies
Vitamin B12 deficiency is an underrecognized cause of low blood pressure. When B12 levels are too low, the resulting nerve damage can impair the reflexes that keep blood pressure stable when you stand. This can lead to orthostatic hypotension and even fainting episodes. The connection is well established in neurology but often overlooked in general practice.
The good news is that B12-related blood pressure problems are fully correctable with supplementation. In documented cases, patients have completely recovered normal blood pressure regulation after several weeks of B12 therapy. Some researchers have recommended that anyone with unexplained orthostatic hypotension be screened for B12 deficiency, even without obvious signs of anemia or nerve problems. Folate deficiency can contribute similarly by causing anemia, which reduces the blood’s oxygen-carrying capacity and lowers pressure.
Medications for Persistent Low Blood Pressure
When lifestyle changes aren’t enough, two main types of medication can help. The first type works by tightening blood vessels, which directly increases pressure. Midodrine is the most commonly prescribed option in this category, and it has been shown in multiple trials to improve both standing blood pressure and symptom scores over several weeks. These medications are short-acting, so they’re typically taken multiple times per day and avoided close to bedtime to prevent high blood pressure while lying down.
The second approach uses a synthetic hormone that helps your kidneys retain sodium, expanding your blood volume from the inside. This is essentially a pharmacological version of the salt-and-water strategy, and it works best when combined with an already increased salt intake. Your doctor would monitor your potassium levels while on this medication since sodium retention can push potassium down.
Warning Signs of Dangerously Low Pressure
Most low blood pressure is uncomfortable but not dangerous. However, extremely low pressure can progress to shock, which is a medical emergency. The signs to watch for: confusion (especially in older adults), cold and clammy skin, skin that looks noticeably pale, rapid and shallow breathing, or a pulse that feels weak and fast. If you or someone near you develops these symptoms, call emergency services immediately. This is not a situation where home remedies apply.