Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, fainting, and fatigue. If your blood pressure runs too low, several practical strategies can help bring it up, ranging from simple daily habits to physical techniques that work in seconds. What’s considered too low varies from person to person, and most healthcare professionals only treat it when it causes symptoms.
Drink More Fluids
Dehydration is one of the most common and fixable causes of low blood pressure. When your body loses water, blood volume drops. Pressure sensors in your neck and aorta detect this drop and signal your heart to beat faster and harder to compensate, but that only goes so far. Staying ahead of fluid loss is more effective than relying on your body’s backup systems.
The average adult takes in about 2,500 mL (roughly 3 quarts) of fluid per day. If your blood pressure tends to run low, you may need more than that, especially in hot weather, during exercise, or if you’re on a diuretic. Water is the simplest option, but drinks with electrolytes can help your body retain the fluid longer rather than just passing it through your kidneys.
Increase Salt Intake
Salt helps your body hold onto water, which increases blood volume and raises blood pressure. For most people, the standard health advice is to limit sodium. But if you have chronically low blood pressure, a modest increase in salt can be genuinely helpful. Adding salt to meals, eating salted nuts or olives, or drinking broth are simple ways to do this. The key is that more salt only helps if you’re also drinking enough fluid to go with it.
Use Caffeine Strategically
A cup of coffee can raise your blood pressure by up to 10 mmHg. The effect typically kicks in within 30 minutes, peaks around an hour, then gradually fades. This makes caffeine a useful short-term tool, particularly in the morning when blood pressure tends to be at its lowest. Tea and caffeinated sodas have a similar but smaller effect. If you drink caffeine regularly, your body builds some tolerance, so the boost becomes less pronounced over time.
Physical Maneuvers That Work Fast
When you feel lightheaded from a sudden blood pressure drop, specific body movements can push blood back toward your heart and brain within seconds. The American Heart Association recommends several of these counterpressure maneuvers:
- Leg crossing with muscle tensing: Cross your legs and tighten your leg, abdominal, and buttock muscles while standing or lying down.
- Squatting: Lower your body into a squat, which compresses blood vessels in the legs and forces blood upward. Tense your abdomen for extra effect.
- Arm tensing: Grip your hands together and pull your arms in opposite directions with maximum force.
- Fist clenching: Squeeze your fist as hard as you can, with or without an object in your hand.
These are especially useful for people who get dizzy when standing up quickly. Doing one of these maneuvers before or during standing can prevent the drop that causes lightheadedness.
Wear Compression Stockings
Compression stockings apply gentle pressure to your lower legs, preventing blood from pooling in your veins. This keeps more blood circulating back to your heart and brain. According to Cleveland Clinic cardiologist Dr. Luke Laffin, compression stockings tend to raise blood pressure by about 5 to 10 mmHg. That may sound modest, but for someone whose pressure runs low, it can be the difference between feeling fine and feeling faint. Knee-high or thigh-high options both work. Putting them on first thing in the morning, before you stand up, gives you the most benefit.
Eat Smaller, More Frequent Meals
Blood pressure commonly drops after eating because your body diverts blood flow to the digestive system. This is called postprandial hypotension, and it’s more pronounced after large, carbohydrate-heavy meals. Eating six smaller meals throughout the day instead of three large ones reduces the amount of blood diverted at any one time. Keeping those meals lower in carbohydrates also helps, since carbs trigger the largest shifts in blood flow to the gut. If you notice you feel dizzy or weak after meals specifically, this pattern change can make a noticeable difference.
Change Positions Slowly
Orthostatic hypotension, a drop in blood pressure when you stand up, is one of the most common forms of low blood pressure. Gravity pulls blood into your legs the moment you rise, and your cardiovascular system needs a few seconds to compensate. Sitting on the edge of your bed for 30 seconds before standing, or rising from a chair in stages, gives your blood vessels time to tighten and push blood upward. Combining this with the leg-crossing or muscle-tensing maneuvers described above makes it even more effective.
When Lifestyle Changes Aren’t Enough
If daily habits and physical strategies don’t keep your blood pressure high enough to prevent symptoms, prescription medications are available. The two most commonly prescribed options work differently: one tightens blood vessels directly, while the other helps your kidneys retain sodium and water to increase blood volume. Both are effective, though they carry different side effect profiles depending on your overall health. Your doctor would choose between them based on whether you have other conditions like heart failure or kidney problems that make one a better fit than the other.