Low blood pressure, defined as a reading below 90/60 mmHg, can cause dizziness, fatigue, and fainting. The good news is that several straightforward strategies can raise it: increasing salt and fluid intake, wearing compression garments, adjusting how you eat and move, and in some cases, taking medication. Most people with mild low blood pressure can manage it effectively with lifestyle changes alone.
Increase Your Salt and Fluid 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 (blood pressure that drops when you stand up), medical guidelines from the American Society of Hypertension recommend 2,400 to 4,000 mg of sodium per day. For more severe cases, some specialists recommend up to 4,800 mg daily. That’s two to three times higher than the 2,300 mg limit typically recommended for the general population.
A practical approach is to add 1,000 to 2,000 mg of sodium to your meals three times per day. You can do this by salting food more liberally, eating broth-based soups, or snacking on salted nuts and olives. Some people use salt tablets if they struggle to get enough through food alone.
Hydration matters just as much. When your blood volume is low, even mild dehydration makes symptoms worse. A general guideline for adults is roughly 25 to 30 ml of water per kilogram of body weight per day, which works out to about 2 to 2.5 liters for most people. If you’re active or in a hot climate, you’ll need more. Drinking a large glass of water 15 minutes before standing up from a long rest can also help prevent a sudden drop.
How You Stand Up Matters
One of the most immediate triggers for low blood pressure symptoms is the simple act of getting up too quickly. When you stand, gravity pulls blood into your legs, and your body needs a moment to compensate. If that response is sluggish, your blood pressure drops and you feel lightheaded or faint.
A few habits can make a significant difference. When getting out of bed, sit on the edge for a full minute before standing. Stretch and flex your calf muscles while still sitting to help push blood back toward your heart. Once upright, if you feel woozy, squeeze your thigh muscles, tighten your abdomen, or rise up onto your tiptoes to force blood upward. Sleeping with the head of your bed slightly elevated (a few inches) can also reduce morning symptoms by preventing blood from pooling as much overnight.
Physical Maneuvers That Raise Blood Pressure Fast
If you feel a dizzy spell coming on, specific muscle-tensing techniques can buy your body time to stabilize. These are called counterpressure maneuvers, and the American Heart Association recognizes them as effective at preventing fainting episodes.
The most effective options involve your lower body: crossing your legs and squeezing your thigh muscles together, squatting down, or marching in place. Lower-body maneuvers raise blood pressure more than upper-body ones, though gripping and tensing your arm muscles or clenching your fists can also help in a pinch. These techniques work by compressing blood vessels in your large muscle groups, which pushes blood back into your central circulation and temporarily raises your pressure.
Eat Smaller, Low-Carb Meals
Blood pressure commonly drops after eating because your body redirects blood flow to your digestive system. Normally, your heart rate increases and blood vessels elsewhere tighten to compensate. But if those responses don’t kick in strongly enough, you end up feeling dizzy or weak after meals.
Large meals and high-carbohydrate foods are the biggest triggers. Carbohydrates cause more blood to flow to the gut than protein or fat does. The fix is straightforward: eat six smaller meals throughout the day instead of three large ones, and keep each meal relatively low in refined carbohydrates. That means cutting back on white bread, pasta, rice, and sugary foods at any single sitting. Spreading your food intake across the day keeps the digestive demand on your circulatory system smaller and more manageable.
Caffeine as a Short-Term Boost
A cup of coffee can raise your blood pressure by up to 10 mmHg, which is enough to relieve mild symptoms. The effect kicks in within about 30 minutes, peaks around an hour after drinking, and then gradually fades. A standard 8-ounce cup of coffee contains roughly 80 to 100 mg of caffeine, which is enough to produce a measurable increase.
Caffeine works well as a situational tool, especially before meals or before periods when you know you’ll be on your feet. Keep in mind that regular caffeine drinkers may develop some tolerance, meaning the blood pressure effect becomes less pronounced over time.
Compression Garments
Compression stockings prevent blood from pooling in your legs, which is one of the main reasons blood pressure drops when you stand. For low blood pressure, most specialists recommend waist-high stockings rated at 20 to 30 mmHg or 30 to 40 mmHg of pressure. Knee-high stockings are easier to put on but less effective because they don’t compress the large veins in your thighs.
The key is wearing them consistently during the day, especially in the morning before you get up and start moving around. Many people find them uncomfortable in warm weather, but the symptom relief they provide often makes the trade-off worthwhile. Abdominal binders serve a similar function by preventing blood from pooling in the large blood vessels of your abdomen.
When Medication Becomes Necessary
If lifestyle changes aren’t enough, doctors have two main medication options. The first tightens blood vessels throughout the body, increasing the resistance that blood flows against and raising your pressure. It’s typically taken two to three times a day because it wears off within a few hours. The second is a type of steroid that helps your kidneys retain sodium and water, expanding your overall blood volume. It’s usually taken once daily at a low dose.
Both medications require monitoring because they can raise blood pressure too much, particularly when you’re lying down. Your doctor will typically start with the lowest effective dose and adjust based on your symptoms and blood pressure readings in different positions. These medications are generally reserved for people whose symptoms significantly interfere with daily life and haven’t responded well to the non-drug approaches described above.
Putting It All Together
Most people get the best results by combining several of these strategies rather than relying on just one. A typical starting point is increasing salt and water intake, learning to get up slowly, wearing compression stockings during the day, and shifting to smaller, lower-carb meals. Caffeine and counterpressure maneuvers serve as useful on-the-spot tools when symptoms flare. If those measures aren’t enough after a few weeks of consistent effort, medication can fill the remaining gap.