Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, fatigue, and fainting. The good news is that several straightforward strategies can bring your numbers up, ranging from simple hydration changes to physical techniques that work in seconds. Which approach works best depends on whether your low blood pressure is a chronic pattern or something that hits you in specific situations, like standing up or after eating.
Drink More Fluids
Dehydration is one of the most common and easily fixable causes of low blood pressure. When your body loses fluid, your blood volume drops, and there simply isn’t enough liquid in your vascular system to maintain adequate pressure. As a Cleveland Clinic cardiologist put it, “you’re just not filling up the pipes enough for what your vascular system needs.”
Drinking water is the simplest first step. Aim for consistent intake throughout the day rather than gulping large amounts at once. If you’re prone to low blood pressure in the morning, drinking a full glass of water before getting out of bed can help prevent that lightheaded feeling when you stand. Dehydration also raises sodium concentration in your blood, which triggers your body to release a hormone called vasopressin. This hormone constricts blood vessels and helps retain water, both of which raise pressure. But relying on that emergency response isn’t ideal. Staying ahead of dehydration keeps your blood volume stable in the first place.
Increase Your Salt Intake
While most health advice tells people to cut back on sodium, the opposite applies when your blood pressure runs too low. Salt helps your body retain water, which increases blood volume and raises pressure. For people with chronically low blood pressure, a daily intake of at least 6 grams of salt (about one teaspoon) is a common recommendation. That’s roughly double what the average heart-healthy guideline suggests.
Practical ways to get more salt include adding it to meals, snacking on salted nuts or olives, drinking broth, or using electrolyte drinks. If you have kidney disease or heart failure, increasing salt without medical guidance can cause problems, so this strategy works best for people whose low blood pressure is the primary concern.
Physical Maneuvers That Work Fast
When you feel a sudden drop, like dizziness upon standing, specific body movements can raise your blood pressure within seconds. The American Heart Association identifies several of these counterpressure maneuvers:
- Leg crossing with muscle tensing: Cross your legs and tighten your leg, abdominal, and buttock muscles simultaneously. This works while lying down or standing.
- Squatting: Lower yourself into a squat, which forces blood from your legs back toward your heart. Tense your lower body and abdominal muscles while squatting, then stand once the dizziness passes.
- Arm tensing: Grip your hands together, interlocking your fingers, and pull your arms in opposite directions with maximum force.
- Fist clenching: Clench your fist as hard as you can, with or without holding an object.
These techniques work by compressing blood vessels in your large muscle groups, pushing blood back into central circulation and temporarily boosting pressure. They’re especially useful for orthostatic hypotension, the type of low blood pressure triggered by standing up. Making a habit of tensing your legs before you rise from a chair or bed can prevent drops before they happen.
Wear Compression Garments
Compression stockings prevent blood from pooling in your legs, which is a major contributor to low blood pressure when you’re upright. Gravity constantly pulls blood downward, and if your body doesn’t compensate well, your brain and organs don’t get enough circulation.
For meaningful results, most specialists recommend waist-high stockings rated at 20 to 30 mmHg or 30 to 40 mmHg of pressure. Knee-high socks provide some benefit, but waist-high garments cover far more vascular territory and are more effective. The trade-off is comfort: they can feel hot and tight, especially in warm weather. Putting them on first thing in the morning, before blood has had a chance to pool in your legs, gives you the best results throughout the day.
Adjust How You Eat
Large meals can cause your blood pressure to drop significantly during digestion. This happens because your body redirects a large volume of blood to your gut to process food, leaving less available for the rest of your circulation. This is called postprandial hypotension, and it’s especially common in older adults.
Two changes make a notable difference. First, eat smaller, more frequent meals. Six smaller meals spread through the day keep your digestive system from demanding a massive blood flow shift all at once. Second, reduce the carbohydrate content of your meals. Carbohydrates are digested quickly and tend to cause bigger blood pressure drops than protein or fat. Swapping a large pasta dish for a smaller portion with more protein and healthy fats can prevent that post-meal crash. Avoiding alcohol with meals also helps, since alcohol dilates blood vessels and compounds the pressure drop.
Lifestyle Habits That Help Over Time
Beyond the immediate fixes, a few ongoing habits can keep your baseline blood pressure from dipping too low. Sleeping with the head of your bed elevated a few inches (using blocks under the bed frame, not just extra pillows) reduces the sudden pressure drop your body experiences when you get up in the morning. This works by keeping your body slightly tilted overnight, which trains your cardiovascular system to handle position changes more smoothly.
Getting up slowly also matters more than most people realize. Sit on the edge of the bed for 30 seconds before standing. When rising from a chair, pause and flex your calves a few times before walking. These small delays give your blood vessels time to constrict and stabilize your pressure. Caffeine can provide a short-term boost as well, since it constricts blood vessels. A cup of coffee before situations where you know your blood pressure tends to drop, like a long morning commute, can be a practical tool.
When Low Blood Pressure Needs Medical Treatment
If lifestyle changes aren’t enough, medications are available. The most commonly prescribed option for orthostatic hypotension works by tightening blood vessels directly, raising pressure so you can stand and move without dizziness or fainting. Another class of medication helps your body retain more sodium and water, increasing blood volume from the inside. These are typically prescribed when low blood pressure is significantly affecting your quality of life or causing falls.
Chronically low blood pressure can also signal an underlying issue. Anemia, thyroid disorders, adrenal insufficiency, and certain heart conditions all lower blood pressure as a secondary effect. If your readings are consistently low and you’re experiencing symptoms like persistent fatigue, blurred vision, nausea, or fainting, the blood pressure itself may not be the root problem. Treating the underlying condition often brings pressure back to a normal range without needing to address blood pressure directly.
Sudden, severe drops accompanied by cold or clammy skin, rapid shallow breathing, confusion, or a weak pulse are a medical emergency. This pattern can indicate shock, severe infection, or significant blood loss, all of which require immediate treatment.