Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, lightheadedness, and fainting. The good news is that several straightforward strategies can raise it, from quick physical maneuvers that work in seconds to longer-term habits that keep your blood volume and vascular tone where they need to be.
Quick Physical Maneuvers
When you feel a blood pressure drop coming on (the telltale wooziness when you stand up, or a wave of lightheadedness), certain body positions can push blood back toward your heart and brain almost immediately. The American Heart Association recommends these counter-pressure maneuvers:
- Cross your legs and squeeze. While standing or lying down, cross your legs and tense your leg, abdominal, and buttock muscles simultaneously. This compresses the veins in your lower body and forces blood upward.
- Squat down. Lowering into a full squat traps blood in your upper body and raises pressure quickly. Tense your lower body and abdomen while squatting, then stand slowly once symptoms clear.
- Pump your calves. If you’ve been standing still for a while, rocking up onto your toes repeatedly activates the calf muscles, which act as a pump for venous blood return.
These aren’t long-term fixes, but they can prevent a faint or fall in the moment. If you’re prone to drops when standing, make a habit of pausing at the edge of the bed and tensing your legs before getting up.
Drink More Water, and Drink It Quickly
Water raises blood pressure through a surprisingly fast reflex. A study published in Circulation found that drinking about 480 mL (roughly 16 ounces, or two standard cups) of water produced a measurable increase in blood pressure within five minutes. The effect peaked around 30 to 35 minutes after drinking and lasted over an hour. Drinking 480 mL caused a noticeably stronger response than drinking half that amount, so a full glass or two is more effective than sipping.
The mechanism isn’t just about expanding blood volume. Drinking water triggers a sympathetic nervous system response that tightens blood vessels. For practical purposes, this means keeping a water bottle nearby and drinking a full glass before situations that tend to drop your pressure, like standing for a long time or getting out of bed in the morning.
Increase Your Salt Intake
Salt helps your body retain water, which increases blood volume and raises pressure. While most dietary advice focuses on limiting sodium, people with symptomatic low blood pressure often benefit from the opposite approach. Hackensack Meridian Health suggests at least 6 grams of salt per day for individuals with low blood pressure, which is roughly double what standard guidelines recommend for the general population.
You can get there by salting your food more liberally, snacking on salted nuts or olives, or drinking broth. Some people find electrolyte drinks helpful since they combine sodium with fluid. If you have any kidney or heart conditions, though, adding salt without guidance could cause problems, so this strategy works best when you’ve confirmed low blood pressure is your actual issue.
Wear Compression Socks
Compression socks apply gentle, graduated pressure to your lower legs, preventing blood from pooling in your feet and calves. According to the Cleveland Clinic, they raise blood pressure by about 5 to 10 mmHg by slightly narrowing blood vessels. That may not sound like much, but for someone sitting at 85/55, a 10-point bump can be the difference between feeling fine and feeling faint.
Knee-high compression socks are the most common choice. Look for 15 to 20 mmHg pressure for everyday use. Put them on first thing in the morning before you stand up, since that’s when blood is most likely to pool in your legs. Waist-high compression garments exist for more severe cases, but most people find knee-highs sufficient and far easier to tolerate in warm weather.
Eat Smaller, Lower-Carb Meals
Blood pressure naturally dips after eating because your body diverts blood to your digestive system. Normally, your heart rate increases and blood vessels elsewhere tighten to compensate. But when that compensation falls short, you get postprandial hypotension: a noticeable blood pressure drop within one to two hours of a meal that can cause dizziness or even fainting.
Large, carbohydrate-heavy meals are the worst offenders because they demand the most digestive blood flow. Splitting your intake into smaller, more frequent meals reduces the load on your circulatory system at any given time. Favoring protein, fat, and fiber over refined carbs also helps because those nutrients digest more slowly and don’t trigger as dramatic a blood flow shift. If you notice you consistently feel lightheaded after lunch or dinner, meal size and composition are the first things to adjust.
Other Daily Habits That Help
Beyond the core strategies above, a few smaller adjustments can add up. Avoid standing in one position for extended periods. If your job requires it, shift your weight, bend your knees periodically, and tense your leg muscles. Hot environments, including hot showers and saunas, dilate blood vessels and drop pressure, so keep water temperature moderate and sit on a shower stool if you tend to get dizzy.
Alcohol lowers blood pressure, sometimes sharply. Even one or two drinks can worsen symptoms in people already running low. Caffeine, on the other hand, temporarily raises blood pressure for most people and can be a useful tool in the morning when orthostatic drops are most common. A cup of coffee or tea before getting active is a simple countermeasure.
Rising slowly from bed or a chair gives your cardiovascular system time to adjust. Sit at the edge of the bed for 30 seconds, then stand gradually. This is especially important in the morning, when blood pressure tends to be at its lowest after hours of lying flat. One commonly recommended strategy, elevating the head of your bed by six inches, was tested in a controlled trial of older adults with orthostatic hypotension and showed no benefit over six weeks, so it’s probably not worth the trouble.
Signs Your Low Blood Pressure Needs Attention
Low blood pressure without symptoms is generally harmless. Plenty of people walk around with readings in the 90/60 range and feel perfectly fine. The concern starts when you’re experiencing frequent dizziness, blurred vision, nausea, fatigue, or difficulty concentrating. Fainting is a clear signal that your brain isn’t getting enough blood flow and should be evaluated.
More urgent warning signs include cold or clammy skin, rapid shallow breathing, confusion, and a weak or rapid pulse. These can indicate shock, where blood pressure has dropped to levels that threaten organ function. That’s a medical emergency, not something to manage with salt and water. If low blood pressure is a new development rather than a lifelong pattern, or if it’s worsening, it’s worth investigating underlying causes like dehydration, blood loss, infection, heart problems, or medication side effects.