Low blood pressure, defined as a reading below 90/60 mmHg, only needs attention when it causes symptoms like dizziness, lightheadedness, blurred vision, or feeling faint. If you’re experiencing those symptoms right now, the fastest responses are physical: lie down with your legs elevated, drink water, and eat something salty. Beyond that initial response, several strategies can help you manage low blood pressure day to day.
What to Do Right Now
If you’re feeling dizzy or lightheaded, sit or lie down immediately. Elevating your legs above heart level helps blood return to your brain faster. If you can’t lie down, squatting is a surprisingly effective alternative. Lowering your body into a squat compresses the blood vessels in your legs and pushes blood upward. The American Heart Association recommends this as a first-line physical maneuver for people who feel faint.
While you’re seated or lying down, drink about 16 ounces (roughly 480 mL) of water. Research published in Circulation found that drinking this amount raises blood pressure within 5 minutes, peaks around 30 to 35 minutes later, and sustains that effect for over an hour. Smaller amounts work too, but 16 ounces produced a noticeably stronger response than 8 ounces. The effect comes from a nerve reflex triggered by water hitting the stomach, not from expanding blood volume.
Eat something salty if you have it available. A handful of salted nuts, a few crackers, or a cup of broth can help retain fluid in your bloodstream and nudge pressure upward.
Physical Maneuvers That Raise Blood Pressure Fast
Beyond lying down and squatting, several muscle-tensing techniques can raise your blood pressure quickly when you feel symptoms coming on. These are called counterpressure maneuvers, and they work by squeezing blood from your muscles back toward your heart.
- Leg crossing with tensing: Cross your legs and tighten your leg, abdominal, and buttock muscles simultaneously. You can do this standing or lying down.
- Arm tensing: Grip your hands together, interlocking fingers, and pull in opposite directions with maximum force.
- Isometric handgrip: Clench your fist as hard as you can, with or without squeezing an object like a rubber ball.
These techniques are especially useful when you feel the warning signs of a faint, like tunnel vision, nausea, or sudden warmth. Performing them at the first hint of symptoms can buy you enough time to sit down or prevent a full episode.
Dietary Changes That Help Long-Term
Salt is the cornerstone dietary treatment for chronic low blood pressure. While people with high blood pressure are told to limit sodium, the opposite applies here. For people with orthostatic disorders (conditions where blood pressure drops upon standing), medical guidelines recommend at least 2,300 mg of sodium per day, and some specialists push that to 4,000 mg or higher. One study found that adding roughly 2,400 mg of supplemental sodium per day for two months improved blood vessel control and reduced symptoms of lightheadedness upon standing.
Practical ways to increase salt include adding it liberally to meals, choosing salty snacks like pretzels or olives, drinking broth, or using electrolyte tablets dissolved in water. If you have heart or kidney disease, talk with your doctor before increasing salt intake significantly.
Water intake matters just as much. Staying consistently hydrated keeps blood volume up, which is one of the simplest ways to prevent pressure from dropping. Aim for steady intake throughout the day rather than large amounts all at once.
Preventing Blood Pressure Drops After Meals
Some people experience a noticeable blood pressure drop after eating, particularly after large, carbohydrate-heavy meals. This is called postprandial hypotension, and it’s more common in older adults. When you eat a big meal, blood flows to your digestive system, and your body sometimes can’t compensate fast enough to maintain pressure elsewhere.
A few adjustments can prevent this. Eat smaller, more frequent meals (six per day instead of three). Keep carbohydrate portions modest, since carbs trigger a larger blood flow shift to the gut than protein or fat. Drinking 12 to 16 ounces of water before a meal has been shown to buffer the drop. A caffeinated drink before breakfast or lunch can also help, since caffeine constricts blood vessels slightly.
Preventing Drops When You Stand Up
Orthostatic hypotension is a blood pressure drop of 20 points systolic or 10 points diastolic when you go from sitting or lying down to standing. It’s one of the most common forms of low blood pressure, and it’s responsible for that rush of dizziness you might feel when you get out of bed too quickly.
The simplest prevention is to rise slowly. Sit on the edge of the bed for 30 seconds before standing. When getting up from a chair, pause in a half-standing position. This gives your blood vessels time to tighten and push blood upward against gravity.
Compression garments can also help by preventing blood from pooling in your legs. Knee-high or thigh-high compression stockings at 20 to 30 mmHg are a good starting point. If that feels too tight or hard to put on, 15 to 20 mmHg offers a lighter option. If 20 to 30 mmHg isn’t enough, 30 to 40 mmHg provides stronger compression, though these can be difficult to pull on, especially if you have flexible joints. Waist-high stockings or abdominal compression garments work even better than knee-highs because they cover more surface area where blood pools.
Check Your Medications
Medications are one of the most common and fixable causes of low blood pressure. Blood pressure drugs are the obvious culprits, but many other classes can contribute: antidepressants, medications for an enlarged prostate, drugs for Parkinson’s disease, and some pain medications. Diuretics (water pills) lower blood volume directly, which can tip someone into symptomatic hypotension.
If your low blood pressure started after beginning a new medication or after a dose change, that connection is worth investigating. Don’t stop any medication on your own, but bring it up at your next appointment. Your prescriber may be able to lower the dose, switch to an alternative, or adjust the timing so the peak effect doesn’t coincide with activities like getting out of bed.
When Low Blood Pressure Signals Something Serious
Most cases of low blood pressure are manageable with the strategies above. However, certain symptoms alongside low pressure suggest something more urgent is happening. Confusion, cold or clammy skin, rapid shallow breathing, a weak and fast pulse, or fainting that doesn’t resolve quickly can indicate that your organs aren’t getting enough blood flow. A sudden and severe drop, especially after an injury, allergic reaction, or infection, can signal shock.
Blood pressure that’s chronically low without symptoms is generally not dangerous and often doesn’t need treatment. The threshold that matters is whether your low reading is causing problems in your daily life. If dizziness, fatigue, or near-fainting episodes happen regularly despite trying the strategies above, that pattern warrants a medical evaluation to rule out underlying causes like adrenal insufficiency, heart valve issues, or autonomic nervous system dysfunction.