Low blood pressure, generally defined as a reading below 90/60 mmHg, can cause dizziness, fatigue, and fainting. Raising it involves a combination of quick physical techniques, dietary changes, and lifestyle adjustments that increase blood volume and improve circulation. Here’s what actually works.
Quick Physical Techniques That Work in Seconds
When you feel dizzy or lightheaded from a blood pressure drop, specific muscle-tensing movements can push blood back toward your heart and brain almost immediately. The American Heart Association recommends several of these “counterpressure maneuvers” as first-line responses.
For your lower body: cross your legs and tense your leg, abdominal, and buttock muscles simultaneously. If you can, drop into a full squat, which compresses blood vessels in your legs and forces blood upward. Stay in the squat until symptoms pass, then stand slowly. For your upper body: grip your hands together, interlocking fingers, and pull your arms in opposite directions as hard as you can. You can also clench your fists at maximum force or tuck your chin to your chest while tightening your neck muscles. These moves temporarily squeeze blood out of your limbs and into your core circulation, buying you time until your body adjusts.
Drink More Water (It Has a Surprising Effect)
Water does more than just increase blood volume. Drinking about 16 ounces (480 mL) triggers a reflex that actively raises blood pressure. A study published in Circulation found that drinking 16 ounces of water raised seated blood pressure by 11 mmHg in older adults and by a striking 43 mmHg in people with autonomic disorders. Interestingly, this wasn’t because blood volume expanded. Plasma volume didn’t change at all. Instead, water drinking appears to activate a sympathetic nerve reflex that tightens blood vessels.
Drinking 16 ounces produced a noticeably stronger effect than drinking 8 ounces, so the full amount matters. Make this a habit before meals, before standing up in the morning, and any time you anticipate being on your feet for a while.
Add More Salt to Your Diet
Salt helps your body retain fluid, which increases the total volume of blood circulating through your vessels. For people with orthostatic hypotension (blood pressure that drops when standing), expert guidelines recommend significantly more sodium than the average person consumes. The American Society of Hypertension suggests 2,400 to 4,000 mg of sodium per day for these patients, while some specialists recommend up to 4,000 to 8,000 mg daily depending on severity.
A practical approach is to add 1,000 to 2,000 mg of sodium to your diet three times per day through salty foods, broth, or electrolyte drinks. This is the opposite of the usual dietary advice for high blood pressure, so it’s worth confirming with your doctor that low blood pressure is actually your issue before loading up on salt.
Prevent Blood Pressure Drops After Meals
Blood pressure commonly dips after eating because your body diverts blood flow to your digestive system. This is called postprandial hypotension, and it’s especially common in older adults. A few targeted habits can prevent it:
- Eat smaller, more frequent meals. Six small meals cause less blood flow diversion than three large ones.
- Cut carbohydrates at meals. High-carb meals trigger the biggest post-meal blood pressure drops.
- Drink 12 to 16 ounces of water before eating. This pre-loads your circulation and buffers the drop.
- Have caffeine with breakfast or lunch. Caffeine constricts blood vessels and can offset the post-meal dip. Skip it later in the day to protect your sleep.
Wear Compression Garments
Compression stockings prevent blood from pooling in your legs when you stand, which is one of the main reasons blood pressure drops in the first place. For low blood pressure, most specialists recommend waist-high stockings rated at 20 to 30 mmHg or 30 to 40 mmHg of pressure. Knee-high stockings are easier to put on but less effective because they don’t compress the large veins in your thighs and abdomen. If you can tolerate waist-high garments, they make a measurable difference, particularly if you’re on your feet for long stretches.
Adjust How You Sleep
Sleeping completely flat can worsen low blood pressure problems during the day. When you lie flat all night, your kidneys filter out more fluid, which reduces blood volume by morning. Elevating the head of your bed by about 9 inches (roughly a 10-degree tilt) trains your body to retain more fluid overnight and reduces the dramatic blood pressure drop you feel when getting up. Prop the bed frame itself rather than just stacking pillows, which only bend your neck without changing the angle of your whole body.
Medications for Persistent Low Blood Pressure
When lifestyle changes aren’t enough, doctors can prescribe medications that raise blood pressure through different mechanisms. One common option helps your kidneys retain sodium and water, effectively expanding your blood volume. Another tightens blood vessels directly, preventing blood from pooling in your extremities. These are typically started at low doses and adjusted gradually. Both work best when combined with the salt, fluid, and compression strategies above, not as replacements for them.
When Low Blood Pressure Is an Emergency
Most low blood pressure is uncomfortable but not dangerous. However, a sudden drop paired with certain symptoms signals a medical emergency. Call for emergency help if low blood pressure occurs alongside chest pain, difficulty breathing, a racing heart, fever, or a recent injury. A blood pressure drop severe enough to cause confusion, cold or clammy skin, or loss of consciousness also warrants immediate medical attention. These combinations can indicate internal bleeding, severe infection, or a cardiac event that needs treatment fast.