Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, lightheadedness, and fainting. If your numbers run low and you’re feeling the effects, there are several practical strategies that can help bring your blood pressure up, ranging from immediate physical techniques to longer-term lifestyle changes.
Drink More Water
One of the simplest and most effective ways to raise blood pressure is to drink more fluids. Water increases your blood volume, and it also triggers your sympathetic nervous system to tighten blood vessels slightly, both of which push pressure upward. Studies show that water drinking increases levels of norepinephrine in the blood and boosts nerve signaling to the legs, helping your body maintain better vascular tone.
Aim for 2 to 3 liters of fluid per day. This is especially important if you tend to feel dizzy when standing up, since adequate hydration improves your body’s ability to handle that positional change. Keeping a water bottle nearby and sipping throughout the day is more effective than trying to catch up with large amounts at once.
Increase Your Salt Intake
Salt helps your body retain water, which expands blood volume and raises pressure. For most health conditions, people are told to reduce sodium. Low blood pressure is one of the few situations where the opposite applies. Adding salt to meals, eating salty snacks like olives or broth, or using electrolyte drinks can all help. If your doctor has confirmed that your blood pressure runs low, a modest increase in dietary sodium is one of the first things typically recommended.
Physical Maneuvers That Work Quickly
If you feel a sudden drop in blood pressure (the room starts spinning, your vision narrows, you feel faint), specific muscle-tensing techniques can buy you time by squeezing blood from your legs and abdomen back toward your heart and brain. The American Heart Association describes several of these counterpressure maneuvers:
- Cross your legs and squeeze. While standing or lying down, cross your legs and tense your leg, abdominal, and buttock muscles simultaneously.
- Squat down. Lowering into a squat compresses the large veins in your legs and forces blood upward. Tense your lower body and abdomen while squatting, then stand slowly once symptoms pass.
- Grip and pull. Interlock your fingers and pull your hands apart with maximum force, as if trying to separate them. This upper-body tension raises pressure quickly.
- Clench your fists. Make a tight fist (with or without something in your hand) and hold the contraction.
- Tuck your chin. Press your chin toward your chest and tighten your neck muscles.
These aren’t long-term fixes, but they can prevent a faint when you feel one coming on. They work within seconds and are safe to do anywhere.
Eat Smaller, More Frequent Meals
Blood pressure often drops after eating because your body diverts blood flow to the digestive system. Larger meals cause bigger drops. Switching from three standard meals to six or seven smaller ones throughout the day reduces this effect significantly.
The type of food matters too. Foods made with highly refined flour (white bread, white rice), potatoes, and sugary drinks move quickly from the stomach to the small intestine, and this rapid transit worsens post-meal blood pressure drops. Choosing meals with more protein, healthy fats, and complex carbohydrates slows digestion and keeps your pressure more stable.
Wear Compression Garments
Compression stockings or abdominal binders physically squeeze blood out of the deep veins in your legs and push it back toward your core. This prevents the pooling that causes lightheadedness, particularly when you stand. Research confirms that compression stockings elevate resting blood pressure in people with low readings and reduce the drop that occurs on standing.
For the best effect, the pressure should be strongest at the ankle and gradually decrease toward the thigh. Knee-high or thigh-high stockings rated at 15 to 20 mmHg or higher are a reasonable starting point. Abdominal compression binders can also help, especially if leg stockings alone aren’t enough.
Elevate the Head of Your Bed
Sleeping with your head raised by 8 to 12 inches helps your body adjust to gravity changes overnight. This doesn’t mean stacking pillows under your head, which just bends your neck. Instead, place blocks under the legs at the head of the bed so the entire sleeping surface tilts, or use a full-length wedge pillow that elevates your torso. This gentle tilt trains your cardiovascular system to handle positional changes better and can reduce morning dizziness.
Move Slowly When Changing Positions
If low blood pressure hits hardest when you stand up, the way you transition between positions matters. Sit on the edge of the bed for 30 to 60 seconds before standing in the morning. When getting up from a chair, pause halfway. Flex your calves and thighs before you fully stand. These habits give your blood vessels time to tighten and keep blood flowing to your brain during the transition.
Medications for Persistent Low Blood Pressure
When lifestyle measures aren’t enough, doctors may prescribe medication. One common option works by helping your kidneys retain sodium and water, which expands blood volume. It also makes your blood vessels more responsive to the signals that tell them to tighten. This medication is typically started at a low dose and adjusted upward if needed, sometimes alongside increased dietary salt.
Another option directly stimulates the receptors on blood vessels that cause them to constrict, raising pressure more immediately. Your doctor will choose based on what’s causing your low blood pressure and how you respond to initial treatments.
Signs That Low Blood Pressure Needs Urgent Attention
Most low blood pressure is manageable and not dangerous. But certain symptoms signal that your body isn’t compensating well enough. Confusion, cold or clammy skin, rapid shallow breathing, a weak and fast pulse, or blurred vision that doesn’t resolve quickly all suggest your blood pressure has dropped to a level where your organs aren’t getting adequate blood flow. Fainting, especially if it happens repeatedly or results in injury, also warrants immediate medical evaluation. A single low reading on a home monitor without symptoms is rarely a concern on its own.