Low blood pressure, generally defined as a reading below 90/60 mmHg, often responds well to a combination of dietary changes, physical habits, and simple daily adjustments. Some people have naturally low blood pressure with no symptoms at all, and that’s not a problem. But if you’re dealing with dizziness, lightheadedness, fainting, or fatigue, there are concrete steps you can take to bring your numbers up and feel more stable throughout the day.
Why Blood Pressure Drops
Low blood pressure comes down to one of two things: either your blood volume is too low, or your blood vessels aren’t constricting enough to maintain pressure. Dehydration is one of the most common and fixable causes. Blood loss, prolonged bed rest, pregnancy, certain heart conditions, and endocrine problems like adrenal insufficiency or thyroid disorders can also drive readings down. Some medications, particularly those prescribed for high blood pressure, depression, or prostate issues, lower blood pressure as a side effect.
The most common pattern people notice is orthostatic hypotension, where blood pressure drops when you stand up after sitting or lying down. This happens because gravity pulls blood toward your legs, and your body doesn’t compensate quickly enough. Another pattern is postprandial hypotension, a drop that occurs after eating, when blood flow diverts to your digestive system. Both types are manageable once you understand what triggers them.
Drink More Fluids Than You Think You Need
Increasing your fluid intake is the simplest and most effective first step. When your blood volume is low, there simply isn’t enough fluid in your circulatory system to maintain adequate pressure. General guidelines suggest about 3.7 liters (125 ounces) of fluid per day for men and 2.7 liters (91 ounces) for women, though people with low blood pressure often benefit from aiming toward the higher end of that range or beyond.
Water is the foundation, but plain water alone doesn’t stay in your bloodstream as effectively as water paired with electrolytes. Adding salt or drinking electrolyte beverages helps your body retain the fluid rather than just passing it through your kidneys. If you notice your blood pressure drops after meals, drinking 12 to 16 ounces of water before eating can help blunt that dip.
Increase Your Salt Intake
This is the opposite advice most people hear about blood pressure, but for those with chronically low readings, salt is a tool. Sodium helps your body hold onto water, which expands your blood volume and raises pressure. Medical guidelines for people with orthostatic disorders recommend anywhere from 2,400 to 4,000 mg of sodium per day, with some experts suggesting even higher amounts depending on severity. For context, the average American already consumes about 3,400 mg daily, so for many people with low blood pressure, the goal is to deliberately add more rather than restrict.
A practical approach is adding roughly 1,000 to 2,000 mg of extra sodium spread across three meals. Salting your food liberally, eating broth-based soups, snacking on salted nuts or pretzels, and using electrolyte drinks are all easy ways to get there. One study found that patients who added about 2,400 mg of supplemental sodium daily for two months showed meaningful improvements in their ability to tolerate standing and in blood flow to the brain.
Use Physical Maneuvers to Prevent Dizziness
When you feel lightheaded or sense that your blood pressure is dropping, certain muscle-tensing techniques can quickly push blood back toward your heart and brain. The American Heart Association recommends several of these counterpressure maneuvers:
- Leg crossing with tensing: Cross your legs and squeeze your leg, abdominal, and buttock muscles simultaneously. You can do this while standing or lying down.
- Squatting: Lower yourself into a squat, which compresses the blood vessels in your legs and forces blood upward. Tense your lower body and abdomen while squatting, then stand slowly once symptoms pass.
- Arm tensing: Grip your hands together and pull your arms in opposite directions as hard as you can. This raises blood pressure throughout your body within seconds.
- Fist clenching: Squeeze your fist at maximum contraction, with or without gripping an object.
These techniques work because tensing large muscle groups compresses nearby blood vessels and forces blood back into central circulation. They’re especially useful in situations where you can’t sit or lie down right away, like standing in line or riding public transit.
Adjust How You Stand Up and Move
Many blood pressure drops happen during transitions: going from lying to sitting, sitting to standing, or standing still for too long. Slowing these transitions gives your cardiovascular system time to adjust. When getting out of bed, sit on the edge for 30 seconds before standing. When getting up from a chair, rise slowly and pause before walking.
Avoid standing motionless for long periods. If you have to stand, shift your weight, rock on your heels, or march in place to keep blood circulating. Crossing your legs while standing also helps. During hot weather, be especially cautious, since heat dilates blood vessels and worsens low blood pressure.
Elevate the Head of Your Bed
Sleeping with the head of your bed raised 10 to 20 degrees can reduce the severity of morning blood pressure drops. This slight incline prevents blood from pooling in your torso overnight and helps your body maintain the reflexes it uses to regulate blood pressure when upright. You can achieve this by placing blocks or risers under the legs at the head of the bed, or by using a wedge pillow. This is more effective than simply propping up extra pillows, which tends to bend your body at the waist rather than creating a consistent incline.
Manage Post-Meal Blood Pressure Drops
If your blood pressure tends to fall after eating, the size and composition of your meals matter. Large, carbohydrate-heavy meals cause the biggest drops because they pull a significant amount of blood to your digestive tract. Switching to six smaller meals instead of three large ones reduces this effect. Keeping carbohydrates moderate at each meal helps too.
Other practical strategies include lying down for 15 to 20 minutes after eating, drinking a caffeinated beverage before breakfast or lunch (caffeine temporarily constricts blood vessels), and taking a short 10-minute walk after meals to keep circulation active. If you take blood pressure medication, talk with your provider about whether the timing of your dose could be shifted away from mealtimes.
Compression Garments
Compression stockings and abdominal binders work by gently squeezing your blood vessels, preventing blood from pooling in your legs and abdomen. Compression socks typically raise blood pressure by about 5 to 10 mmHg, which can be enough to eliminate symptoms for people with mild to moderate drops. Waist-high stockings or abdominal compression garments tend to work better than knee-high socks because they cover a larger area of blood vessel territory. Put them on before getting out of bed in the morning, since that’s when pooling is most likely to cause problems.
When Lifestyle Changes Aren’t Enough
If dietary and behavioral strategies don’t control your symptoms, medications can help. The most commonly prescribed option works by tightening blood vessels to increase resistance and push pressure up. It’s a short-acting medication taken multiple times daily, typically before periods when you’ll be upright and active. A second option works differently, helping your kidneys retain sodium so your blood volume stays higher throughout the day. Both are considered first-line treatments for orthostatic hypotension.
A newer medication acts as a building block for a chemical your nervous system uses to constrict blood vessels, and it’s also approved specifically for orthostatic hypotension. Additional options exist for cases that don’t respond to initial treatment, so persistent symptoms are worth bringing up even if you’ve already tried one approach.
Warning Signs That Need Immediate Attention
Low blood pressure becomes dangerous when it drops severely enough to reduce blood flow to your organs. Signs that this is happening include confusion, cold or clammy skin, rapid shallow breathing, a weak and fast pulse, and blurred vision. Fainting, especially with an injury from falling, is also a red flag. These symptoms can indicate shock, which requires emergency care. A single episode of mild dizziness that resolves when you sit down is very different from progressive or severe symptoms that don’t improve with position changes.