Low blood pressure, generally defined as a reading below 90/60 mmHg, becomes a problem when it causes dizziness, fainting, fatigue, or blurred vision. If your numbers run low but you feel fine, there’s usually nothing to fix. But if symptoms are disrupting your day, a combination of dietary changes, physical strategies, and lifestyle adjustments can bring your blood pressure up to a more comfortable range.
Increase Your Salt and Fluid Intake
Salt is the most direct dietary tool for raising blood pressure. Sodium causes your body to retain water, which increases blood volume and pushes pressure higher. For most people with low blood pressure, adding 1,000 to 2,000 mg of sodium to the diet with each meal is a common starting point. Medical guidelines for people with orthostatic hypotension (the kind that hits when you stand up) recommend anywhere from 2,400 to 4,000 mg of sodium per day, depending on severity. One study found that about 2,400 mg of supplemental sodium per day improved blood pressure control and reduced fainting episodes within two months.
Practical ways to get more salt include salting your food more liberally, eating broth-based soups, adding olives or pickles to meals, or using electrolyte drinks. Some people find it easier to take salt tablets.
Fluid intake matters just as much. Water increases your blood volume directly, and dehydration is one of the most common triggers for low blood pressure episodes. Aim for at least 2 to 3 liters of water per day, and more if you’re active, in hot weather, or taking medications that cause fluid loss. Alcohol works against you here because it’s dehydrating and lowers blood pressure on its own.
One important caveat: increasing salt is not safe for everyone. If you have heart failure, kidney disease, or high blood pressure that’s being treated, extra sodium can cause dangerous fluid retention and make your heart work harder. Talk to your doctor before deliberately increasing salt if you have any cardiovascular or kidney condition.
Eat Smaller, Lower-Carb Meals
Blood pressure naturally drops after eating because your body diverts blood to the digestive system. Large meals high in carbohydrates cause the biggest dips, a condition called postprandial hypotension. This is especially common in older adults and can cause lightheadedness or fainting 30 to 60 minutes after a meal.
The fix is straightforward: eat six smaller meals throughout the day instead of three large ones, and keep carbohydrates moderate at each sitting. Pairing carbs with protein, fat, or fiber slows digestion and blunts the blood pressure drop. If you notice symptoms mainly after meals, this single change can make a significant difference.
Use Physical Counter-Pressure Maneuvers
When you feel a wave of dizziness or lightheadedness coming on, specific muscle-tensing movements can raise your blood pressure within seconds. The American Heart Association recommends several of these:
- Cross your legs and squeeze. While standing or lying down, cross your legs and tense your leg, abdominal, and buttock muscles simultaneously. This pushes blood from your lower body back toward your heart.
- Squat down. Lowering into a squat compresses the blood vessels in your legs and raises blood pressure quickly. Tense your lower body and abdominal muscles while squatting for a stronger effect.
- Grip and pull. Hook your fingers together in front of your chest and pull your arms in opposite directions with maximum force. This isometric contraction raises blood pressure through the whole body.
- Clench your fists. Make a tight fist, with or without a small object in your hand, and hold the contraction for several seconds.
These maneuvers are most useful for preventing fainting when you feel pre-syncope symptoms like tunnel vision, nausea, or wooziness. They’re a temporary fix, not a long-term treatment, but they can prevent a fall in the moment.
Wear Compression Stockings
Compression stockings prevent blood from pooling in your legs when you stand. They work by applying steady pressure that helps push blood back up toward your heart. For low blood pressure, medium-grade stockings rated at 20 to 30 mmHg are the most commonly recommended range. Higher compression (above 30 mmHg) may be needed for more severe cases but typically requires a prescription and fitting.
Waist-high stockings or abdominal binders are more effective than knee-high socks because a large portion of blood pools in the abdomen, not just the calves. Many people find them uncomfortable in warm weather, but the benefit for preventing dizziness on standing is well established. Put them on before getting out of bed in the morning for the best results.
Adjust How You Move and Stand
Simple changes to how you transition between positions can prevent blood pressure from dropping too fast. Get out of bed in stages: sit on the edge of the bed for 30 seconds, then stand slowly. When getting up from a chair, pause before walking. Avoid standing still for long periods, which allows blood to pool in your legs. If you have to stand in line or at an event, shift your weight, rise onto your toes, and tense your calf muscles periodically.
Elevating the head of your bed by 10 to 20 degrees (about 4 to 6 inches) can also help. Sleeping at a slight incline trains your body to retain more fluid and reduces the dramatic blood pressure drop that happens when you go from lying flat to standing in the morning.
Caffeine as a Short-Term Boost
Caffeine raises blood pressure temporarily by constricting blood vessels and increasing heart rate. A cup of coffee or tea before meals or before activities where you’ll be on your feet can provide a noticeable lift. The effect is strongest in people who don’t consume caffeine regularly, since tolerance develops over time. Keep in mind that caffeine is a diuretic, so balance it with extra water to avoid dehydration working against you.
Medications for Persistent Low BP
When lifestyle changes aren’t enough, doctors may prescribe medication. The most commonly used drug works by tightening blood vessels throughout the body, which directly raises blood pressure. It’s typically taken three times a day, with the last dose at least four hours before bedtime to avoid dangerously high blood pressure while lying down. The dose starts low and gets adjusted weekly based on your standing and lying blood pressure readings.
Another option is a medication that helps your body retain sodium and water, increasing blood volume. Both of these require regular monitoring because they can push blood pressure too high in certain positions or cause other side effects like fluid retention.
Warning Signs That Need Immediate Attention
Low blood pressure that causes mild dizziness when you stand up too fast is common and usually manageable. But certain symptoms indicate your blood pressure has dropped to a dangerous level. Cold, clammy skin, rapid shallow breathing, a weak and fast pulse, confusion, and a noticeable loss of skin color are signs of shock. This is a medical emergency that requires calling 911. Shock means your organs aren’t getting enough blood flow, and it can become life-threatening quickly.