If your blood pressure runs low, several practical strategies can bring it up, from drinking more water and increasing salt intake to simple physical maneuvers you can do anywhere. Low blood pressure generally becomes a concern when it drops below 90/60 mmHg and causes symptoms like dizziness, lightheadedness, or fainting. The right approach depends on whether you need a quick fix in the moment or a longer-term solution.
Drink More Water, Especially Quickly
One of the simplest and fastest ways to raise blood pressure is drinking water. Research published by the American Heart Association found that drinking about 480 mL (roughly 16 ounces) of water produces a noticeable increase in blood pressure within five minutes. The effect peaks around 30 to 35 minutes and lasts over an hour. Drinking the full 16 ounces produces a stronger response than drinking only 8 ounces, so the volume matters.
This works especially well before meals. Drinking 12 to 16 ounces of water before eating can also help prevent the blood pressure dip that some people experience after a meal, a condition called postprandial hypotension.
Increase Your Salt Intake
Salt raises blood pressure by helping your body retain fluid, which increases blood volume. For people with chronically low blood pressure, multiple medical guidelines recommend significantly more salt than the general population is told to eat. The European Society of Cardiology recommends up to 10 grams of salt per day for people with orthostatic hypotension (the kind that hits when you stand up). The American Society of Hypertension recommends 6 to 10 grams daily for the same group.
For context, the average dietary guideline for healthy adults caps sodium at about 2,300 mg per day, which is roughly 6 grams of salt. So if you have low blood pressure, you may actually need more salt than the standard recommendation, not less. Practical ways to increase salt include adding it liberally to food, eating salty snacks like pickles or olives, or drinking broth. Some people use salt tablets in 0.5 to 1 gram doses, taken a few times daily.
Physical Maneuvers That Work Fast
When you feel blood pressure dropping, whether it’s dizziness upon standing or a lightheaded spell, specific body movements can push blood pressure up within seconds. The American Heart Association recommends several of these “counterpressure maneuvers”:
- Leg crossing with muscle tensing: Cross your legs and squeeze your thigh, buttock, and abdominal muscles simultaneously. This works while standing or lying down.
- Squatting: Lower yourself into a squat, which forces blood from your legs back toward your heart. Tense your lower body and abdomen for extra effect.
- Arm tensing: Grip your hands together, interlocking fingers, and pull your arms in opposite directions as hard as you can.
- Fist clenching: Squeeze your fist at maximum strength, with or without holding something in your hand.
These maneuvers are particularly useful for people who get dizzy when standing up quickly. They buy your cardiovascular system time to adjust.
Wear Compression Garments
Compression stockings prevent blood from pooling in your lower body, which is one of the main reasons blood pressure drops when you stand. Most experts recommend 20 to 30 mmHg or 30 to 40 mmHg compression levels. The key detail many people miss: waist-high stockings work significantly better than knee-high ones. Blood pools throughout the legs, thighs, and abdomen, so knee-high stockings only address part of the problem. If you wear knee-highs, you may actually notice swelling just above the top of the stocking where pooling continues unchecked.
Waist-high compression garments can feel uncomfortable at first. If you can’t tolerate them, thigh-highs are a reasonable compromise, just less effective than the full-length version.
Use Caffeine Strategically
Caffeine can raise blood pressure by about 5 to 10 points in people who don’t consume it regularly. The effect kicks in within 30 minutes and can last up to two hours. A cup of coffee or tea before breakfast or lunch is a simple way to get a temporary boost, especially if you tend to feel worst in the morning.
If you already drink caffeine daily, the effect is smaller because your body builds tolerance. You can check your personal response by measuring your blood pressure before and 30 to 120 minutes after a caffeinated drink.
Adjust How and What You Eat
Large meals, particularly those heavy in carbohydrates, can cause a significant blood pressure drop as your body diverts blood flow to your digestive system. This postprandial hypotension is common in older adults and anyone already prone to low blood pressure.
The fix is straightforward: eat six smaller meals throughout the day instead of three large ones, and reduce the carbohydrate content of each meal. Foods heavy in refined carbs like white bread, pasta, and sugary foods cause the biggest drops. Swapping in more protein, fat, and fiber-rich foods keeps blood pressure more stable after eating.
Elevate the Head of Your Bed
If low blood pressure is worst in the morning, how you sleep may be part of the problem. Lying completely flat overnight can trigger your body to shed excess sodium and fluid through your kidneys, leaving you with lower blood volume by morning. Elevating the head of your bed by 30 to 45 degrees counteracts this process. You can use a wedge pillow or raise the head of the bed frame with blocks. This is not the same as propping your head up with pillows, which bends your neck without changing your body’s angle relative to gravity.
When Low Blood Pressure Becomes Dangerous
Most low blood pressure is uncomfortable but not dangerous. It crosses into emergency territory when you develop signs of shock: confusion (especially in older adults), cold and clammy skin, pale skin color, rapid shallow breathing, or a weak and rapid pulse. These symptoms together indicate that your organs aren’t getting enough blood flow and require emergency medical attention.
Orthostatic hypotension, the type triggered by standing, is defined as a drop of more than 20 mmHg in systolic pressure (the top number) or more than 10 mmHg in diastolic pressure (the bottom number) within a few minutes of standing. Any standing blood pressure that falls below 90 mmHg systolic also qualifies. If you regularly experience dizziness, near-fainting, or actual fainting when you stand, tracking these numbers at home gives you useful information to bring to a medical visit.