Low blood pressure, defined as a reading below 90/60 mmHg, isn’t something you “cure” in the traditional sense. For most people, it’s managed through a combination of dietary changes, daily habits, and sometimes medication. The right approach depends entirely on why your blood pressure is low in the first place, whether that’s dehydration, a medication side effect, or an underlying condition. Many people can raise their blood pressure to a comfortable level with simple lifestyle changes alone.
Why Your Blood Pressure Is Low
Before jumping into fixes, it helps to understand what’s driving the problem. Low blood pressure has dozens of possible causes, and the most effective treatment targets the root issue rather than the number on the cuff. Some of the most common causes include dehydration, blood loss, pregnancy, prolonged bed rest, certain medications (especially blood pressure drugs, antidepressants, and diuretics), and nutritional deficiencies like low B12, folate, or iron.
Underlying medical conditions can also be responsible. Heart problems like a very slow heart rate or heart valve disease reduce how much blood your heart pumps. Endocrine disorders, particularly adrenal insufficiency, disrupt hormones that help regulate blood pressure. Nervous system conditions like Parkinson’s disease can interfere with the signals that keep blood pressure stable when you stand up. If your low blood pressure is new, persistent, or causing symptoms like fainting, your doctor will likely look for one of these causes first.
Salt and Fluid Intake
This is the opposite advice from what most people hear about blood pressure. When your blood pressure runs low, increasing salt intake helps your body retain more fluid in the bloodstream, which raises the pressure in your vessels. A general target is at least 6 grams of salt per day, though the right amount varies by person. That’s roughly a teaspoon of table salt, spread across your meals and snacks. You can also get it through salty foods like broth, olives, pickles, and salted nuts.
Hydration matters just as much. Your blood is mostly water, and even mild dehydration shrinks blood volume enough to drop your pressure. A practical starting point is about 25 to 30 milliliters of water per kilogram of body weight per day. For a 70-kilogram (154-pound) person, that works out to roughly 1.75 to 2.1 liters, or about 8 cups. If you’re active, in hot weather, or prone to sweating, you’ll need more. Drinking a large glass of water 15 minutes before standing up can also help if you tend to get dizzy when you rise.
Eating Patterns That Help
Blood pressure commonly drops after meals, a phenomenon called postprandial hypotension. When your digestive system kicks into gear, blood flow shifts toward the gut and away from the rest of your body. Large, carbohydrate-heavy meals make this worse because carbs trigger a bigger blood flow shift than protein or fat.
Two changes make a noticeable difference. First, eat smaller, more frequent meals: six smaller portions through the day instead of three large ones. Second, keep individual meals lower in carbohydrates. This doesn’t mean cutting carbs entirely, just avoiding big pasta dishes or bread-heavy meals that cause a pronounced dip. If you notice symptoms like lightheadedness or fatigue within 30 to 90 minutes after eating, postprandial drops are likely part of your picture.
Compression Garments
Compression stockings work by gently squeezing the blood vessels in your legs, preventing blood from pooling in your lower body. This keeps more blood circulating to your brain and core, which is especially helpful if you get dizzy or lightheaded when standing. 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 blood can still pool in your thighs.
Abdominal binders serve a similar purpose for the midsection. They’re less commonly used but can help people whose blood pressure drops are severe. The key with compression garments is wearing them before you get up in the morning, since that’s when pooling begins. Putting them on after you’ve already been standing and feeling dizzy is less effective.
Movement and Positional Habits
How you move through your day has a surprisingly large impact on blood pressure stability. Standing up slowly gives your cardiovascular system time to adjust. When you go from lying to standing, try sitting on the edge of the bed for 30 seconds first. Clenching your thigh muscles or crossing your legs while standing activates a muscle pump that pushes blood back up toward your heart. These physical counter-maneuvers are simple but genuinely effective at preventing the sudden drops that cause dizziness or fainting.
Avoid standing motionless for long periods. If you’re in a line or at a standing event, shift your weight, rock on your heels, or tighten your calf muscles periodically. Sleeping with the head of your bed elevated by 4 to 6 inches (using blocks under the bedposts, not extra pillows) can also help train your body’s pressure-regulation reflexes overnight.
Exercise and Blood Pressure
Regular exercise improves blood pressure regulation over time by strengthening the heart and improving the reflexes that control blood vessel tone. Moderate aerobic activity like walking, swimming, or cycling for 30 minutes most days is a reasonable goal. The catch is that exercise itself can temporarily lower blood pressure further, so building up gradually matters. Avoid hot environments during workouts, and drink extra fluids before and during exercise.
Strength training can be particularly helpful because it improves muscle tone in the legs, which supports better blood return to the heart. If you tend to feel faint during exercise, recumbent bikes or swimming (where gravity has less effect) are good starting options.
When Medication Is Needed
If lifestyle changes aren’t enough, doctors can prescribe medications that raise blood pressure through different mechanisms. One commonly used option works by helping your kidneys retain sodium, which increases blood volume. It’s typically started at a low dose and adjusted weekly. Another medication works by tightening blood vessels directly, which raises pressure. Both have side effects that require monitoring, so they’re generally reserved for people whose symptoms significantly affect daily life.
If your low blood pressure is caused by another medication you’re taking, your doctor may adjust the dose or switch you to an alternative. This is one of the most common and easily fixable causes, particularly in older adults taking blood pressure medications whose dose has become too aggressive over time.
Triggers to Watch For
Certain situations reliably trigger blood pressure drops in people who are prone to them. Strong emotional reactions, prolonged standing, hot showers or baths, straining during bowel movements, and even rapid bladder filling can all cause sudden dips. Alcohol widens blood vessels and promotes fluid loss, making it a common contributor. Heat in general, whether from weather, hot tubs, or saunas, is one of the most potent triggers because it dilates blood vessels throughout the body.
Recognizing your personal trigger pattern lets you prepare. If hot showers make you dizzy, sit on a shower chair and keep the water warm rather than hot. If standing in lines is a problem, lean against a wall and squeeze your leg muscles. If mornings are your worst time, drink a full glass of water and eat something salty before getting out of bed. These small adjustments, stacked together, often make the difference between symptoms that disrupt your life and ones that rarely bother you.