Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, fatigue, and fainting. The good news is that several practical strategies can raise it, from simple dietary changes to physical techniques that work in seconds. What helps most depends on whether your low blood pressure is a chronic pattern, something that happens when you stand up, or a drop that occurs after meals.
Increase Your Salt and Fluid Intake
Salt is the most straightforward tool for raising blood pressure. Sodium pulls water into your bloodstream, which increases blood volume and pushes pressure higher. For people with low blood pressure, the recommended target is at least 6 grams of salt per day. That’s roughly triple the amount recommended for someone with high blood pressure (under 2 grams) and notably more than the 4 grams suggested for people with normal readings. You can boost your intake by salting food more liberally, eating broth-based soups, or snacking on salted nuts and olives.
Hydration matters just as much. When you’re even mildly dehydrated, your blood volume drops, and so does your pressure. Healthy adults generally need 11.5 to 15.5 cups of total fluid per day from all sources, including food. If you’re prone to low blood pressure, aim for the higher end of that range, and keep a water bottle nearby so you’re sipping consistently rather than trying to catch up later in the day.
Eat Smaller Meals, Lower in Carbs
Some people experience a noticeable blood pressure drop after eating, a condition called postprandial hypotension. It’s especially common in older adults. After a large meal, your body diverts blood to your digestive system, which can leave you lightheaded or unsteady.
A few targeted changes can prevent this. Eating six smaller meals instead of three large ones reduces the blood flow demand on your gut at any one time. Keeping those meals low in carbohydrates also helps, since carbs trigger a bigger digestive response than protein or fat. Drinking 12 to 16 ounces of water about 15 to 20 minutes before a meal has been shown to buffer the post-meal drop. A short 10-minute walk after eating can also keep blood circulating to your brain instead of pooling in your abdomen.
Use Caffeine Strategically
Coffee isn’t just a pick-me-up for your energy. It genuinely raises blood pressure. A dose equivalent to about two cups of coffee (250 mg of caffeine) raised blood pressure by an average of 12/6 mmHg in clinical testing, with the peak effect hitting around 45 minutes after consumption. Research has also found that caffeine can specifically counteract the blood pressure drop that happens after meals in older adults.
The practical takeaway: having coffee or strong tea before breakfast or lunch can help if those are the times you feel most symptomatic. The effect does vary from person to person, and regular heavy caffeine use can blunt its pressure-raising benefits over time, so moderate and consistent use tends to work better than large sporadic doses.
Physical Maneuvers That Work Quickly
If you feel a sudden wave of dizziness or lightheadedness, specific body positions can raise your blood pressure within seconds by squeezing blood back toward your heart. The American Heart Association recommends several of these counter-pressure maneuvers:
- Leg crossing with muscle tensing: Cross your legs and tighten the muscles in your legs, abdomen, and buttocks simultaneously. You can do this standing or lying down.
- Squatting: Lower yourself into a full squat, which compresses the blood vessels in your legs and forces blood upward. Tense your lower body and abdominal muscles while you hold the position.
- Arm tensing: Grip your hands together, interlocking your fingers, and pull your arms in opposite directions as hard as you can.
- Fist clenching: Squeeze your fist as tightly as possible, with or without holding a small object like a stress ball.
These maneuvers are especially useful for people who get dizzy when standing up. Learning to do them automatically when you feel symptoms coming on can prevent falls and fainting episodes.
Compression Garments
Compression stockings work by preventing blood from pooling in your lower body, which is one of the main reasons blood pressure drops when you stand. For low blood pressure, most specialists recommend stockings rated at 20 to 30 mmHg or 30 to 40 mmHg of pressure. Waist-high stockings are more effective than knee-high or thigh-high options because blood can pool throughout the legs, thighs, and abdomen. If waist-high stockings feel too uncomfortable, knee-highs still provide some benefit, just less of it.
Wearing compression garments is most helpful during the hours you’re upright and active. Many people put them on first thing in the morning before getting out of bed, since that’s when the transition from lying down to standing is most likely to cause a drop.
Lifestyle Adjustments That Add Up
Several smaller habits can make a meaningful difference when combined. Avoid standing up quickly. Sit on the edge of your bed for a minute before standing in the morning. Elevating the head of your bed by a few inches (using blocks under the legs, not extra pillows) can help your body adjust to positional changes overnight.
Alcohol tends to lower blood pressure and cause dehydration, so reducing or avoiding it is a practical step. Hot baths, saunas, and prolonged standing in heat can all dilate blood vessels and worsen symptoms. If you exercise, focus on recumbent activities like swimming or recumbent cycling, which don’t require your body to fight gravity as hard to keep blood flowing to your brain.
When Medications Are Needed
If lifestyle changes aren’t enough, several prescription options exist. The most commonly prescribed medication for chronic low blood pressure works by tightening blood vessels, which directly raises pressure. Another option helps your kidneys retain more sodium, increasing your blood volume over time. Both are typically started at low doses and adjusted upward based on how you respond.
Medications are most often used for orthostatic hypotension (drops when standing) or autonomic disorders where the nervous system doesn’t regulate blood pressure properly. Your doctor will also review any existing medications you take, since blood pressure drugs, certain antidepressants, and prostate medications can all cause or worsen low blood pressure as a side effect. Sometimes adjusting those medications solves the problem entirely.