Low blood pressure, defined as a reading below 90/60 mmHg, can cause dizziness, fainting, and fatigue that disrupts daily life. The good news is that several practical strategies can raise your blood pressure, ranging from simple dietary changes to physical techniques that work in seconds. Most people with mild low blood pressure can manage it effectively without medication.
Increase Your Salt and Fluid Intake
Salt is the single most effective dietary tool for raising blood pressure. Sodium causes your body to retain water, which increases blood volume and pushes pressure higher. While most health guidelines tell people to limit sodium, the opposite advice applies when your blood pressure runs too low. People with orthostatic disorders like orthostatic hypotension or POTS are routinely prescribed more than 2,300 mg of sodium per day, well above the standard recommendation for the general population.
A reasonable starting target is 2 to 3 grams of sodium daily through food or salt tablets. You don’t necessarily need extreme amounts. Modest increases in salt intake are often enough to ease symptoms while minimizing any long-term downsides to your heart and kidneys. Salty snacks, broth, pickles, olives, and adding table salt to meals are simple ways to get there.
Fluid intake matters just as much. Aim for 2 to 2.5 liters of water per day to counteract normal urinary losses and keep your blood volume up. Dehydration is one of the most common and easily fixable causes of low blood pressure. If you’re active, live in a hot climate, or sweat heavily, you may need more. Spreading your water intake throughout the day works better than drinking large amounts at once.
Use Physical Counter-Pressure Maneuvers
When you feel a sudden drop in blood pressure (that wave of dizziness or tunnel vision), specific muscle-tensing techniques can buy your body time by pushing blood back toward your heart and brain. The American Heart Association recommends several of these maneuvers:
- Leg crossing with muscle tensing: Cross your legs and squeeze your leg, abdominal, and buttock muscles tightly, whether 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, interlocking fingers, and pull your arms in opposite directions with maximum force.
- Isometric handgrip: Clench your fist as hard as you can, with or without something in your hand.
- Neck flexion: Touch your chin to your chest and tighten your neck muscles.
These techniques are most useful for preventing fainting episodes. They work quickly and can be done discreetly in public. Practicing them regularly means you’ll react automatically when symptoms hit.
Adjust How and What You Eat
Blood pressure naturally drops after meals as your body diverts blood flow to your digestive system. This is called postprandial hypotension, and it can cause significant dizziness or weakness 30 to 60 minutes after eating, especially after large, carb-heavy meals.
To prevent this, eat smaller meals more frequently. Six smaller meals spread through the day keep blood pressure steadier than three large ones. Keeping carbohydrate portions modest at each meal also helps, since carbs trigger a larger blood-flow shift to the gut than protein or fat do. Pairing carbohydrates with protein, healthy fats, or fiber slows digestion and blunts the post-meal blood pressure dip.
Try Caffeine Strategically
Caffeine raises blood pressure by narrowing blood vessels and stimulating your nervous system. If you don’t drink coffee regularly, a single cup can raise your blood pressure by 5 to 10 points. The effect typically kicks in within 30 minutes and can last up to two hours.
This makes caffeine a useful tool before situations where you know your blood pressure tends to drop, like before standing for a long time or after a meal. However, regular caffeine drinkers develop tolerance, so the effect weakens over time. If you already drink several cups a day, adding more is unlikely to help much.
Wear Compression Garments
Compression stockings or leggings prevent blood from pooling in your legs when you stand, which is one of the main triggers for orthostatic hypotension. They work by applying steady pressure that pushes blood back up toward your heart.
Most specialists recommend waist-high stockings with a pressure rating of 20 to 30 mmHg or 30 to 40 mmHg. Knee-high stockings are easier to put on but less effective because a significant amount of blood pools in the thighs and abdomen. Abdominal binders can be used alongside or instead of stockings for people who find full-length compression uncomfortable. The key is consistency: wearing them during the day, particularly during prolonged standing or walking.
Change How You Get Out of Bed
Morning is when blood pressure is typically at its lowest. After lying flat all night, standing up forces your cardiovascular system to rapidly adjust, and for people with low blood pressure, that adjustment can be too slow. A few habits make a noticeable difference:
Sit on the edge of the bed for a minute or two before standing. Flex your feet and tense your leg muscles while sitting to get blood moving. Drink a glass of water before you get up, ideally keeping one on your nightstand. Some practitioners suggest elevating the head of your bed by about six inches using blocks or risers, though a controlled trial in older adults found this didn’t improve symptoms beyond other non-drug measures at six weeks. It may still help some people, but it shouldn’t be the only strategy you rely on.
When Lifestyle Changes Aren’t Enough
If dietary and behavioral strategies don’t control your symptoms, prescription medications can help. The two most commonly used drugs work differently: one tightens blood vessels directly to raise pressure, while the other helps your kidneys retain sodium and water to increase blood volume. Both are taken multiple times daily and are typically started at low doses that get adjusted upward based on your response.
Medication is generally reserved for people whose low blood pressure causes frequent fainting, dangerous falls, or significant quality-of-life problems. Your provider will also look for underlying causes, since low blood pressure can be a side effect of medications you’re already taking (especially blood pressure drugs, antidepressants, or prostate medications) or a sign of conditions like dehydration, heart problems, or nervous system disorders.
Recognizing Dangerous Drops
Most low blood pressure is more annoying than dangerous. But rapid drops can starve your brain and organs of blood flow, which is a medical emergency. Warning signs include a heart rate that’s unusually fast or slow, skin that looks noticeably paler than normal, cool extremities (especially the kneecaps), confusion, or fainting that doesn’t resolve quickly after lying down. Repeated fainting episodes, even brief ones, warrant evaluation because falls are a serious injury risk, particularly for older adults.