When your blood pressure drops and you feel dizzy or lightheaded, the first thing to do is get low. Sit or lie down immediately, and if you can, elevate your legs above heart level to help blood flow back toward your brain. A blood pressure reading below 90/60 mm Hg is generally considered low, but what matters more than the number is how you feel. Some people walk around at 90/60 with no problems, while others get symptoms at slightly higher readings.
Immediate Steps During a Drop
If you’re standing when symptoms hit, you have a few options to buy yourself time. Cross your legs like scissors and squeeze your thighs together, or place one foot on a chair or ledge and lean forward as far as you can. Both moves push pooled blood from your legs back toward your heart and brain. These aren’t just folk remedies; they’re recognized physical counter-maneuvers recommended in clinical guidelines for people prone to blood pressure drops.
Once you’re seated or lying down, drink water. Not a sip, but a full glass or two. Water increases blood volume directly, which raises pressure. Avoid alcohol, even in small amounts, since it’s dehydrating and lowers blood pressure on its own. If you have access to something salty, like broth, crackers, or a sports drink, that can help your body retain the fluid you’re taking in.
Most mild drops resolve within a few minutes with these steps. If you don’t feel better after lying down and hydrating, or if you experience confusion, cold and clammy skin, rapid shallow breathing, or a weak and fast pulse, that pattern suggests shock, which is a medical emergency. Call 911 in that situation.
Why Blood Pressure Drops in the First Place
The most common trigger is simply standing up too fast, especially after lying down or sitting for a long time. When you rise, gravity pulls blood into your legs. Normally your body compensates within a second or two by tightening blood vessels and slightly increasing heart rate. When that reflex is sluggish, blood pressure falls and you feel it as dizziness, tunnel vision, or that “graying out” sensation.
Dehydration is another frequent cause. If you haven’t had enough fluids, there’s simply less blood volume to maintain pressure. Hot weather, illness with vomiting or diarrhea, skipping meals, and intense exercise all deplete fluid. Eating a large meal can also cause a drop, because your body diverts a significant amount of blood to your digestive system. This is called postprandial hypotension and it’s especially common in older adults.
Medications are a major and often overlooked factor. Over 250 drugs are known to cause blood pressure drops. The most common culprits include blood pressure medications themselves (ACE inhibitors, calcium-channel blockers, beta-blockers), certain antidepressants (SSRIs), and medications prescribed for prostate problems (alpha-blockers). If you started a new medication recently and are experiencing drops, that connection is worth raising with whoever prescribed it. Heart conditions, hormonal imbalances, and nervous system disorders can also be at play, particularly if drops happen frequently without an obvious trigger.
Dietary Changes That Help
For people with chronically low blood pressure, the usual advice about limiting salt gets flipped. While most health messaging tells you to cut sodium, people with low blood pressure often benefit from increasing it. One general guideline suggests at least 6 grams of salt per day for people with low blood pressure, compared to the less-than-2-gram target typically recommended for those with high blood pressure. That’s a significant difference. Salting your food generously, eating olives, pickles, broth-based soups, or using salt tablets are all practical ways to get there.
Fluid intake matters just as much as salt. The recommendation for people prone to drops is 2 to 2.5 liters of fluids per day, which works out to roughly 8 to 10 glasses. The salt helps your body actually hold onto that fluid rather than just passing it through your kidneys. The two work together, so increasing one without the other is less effective.
Meal size plays a role too. Eating smaller, more frequent meals throughout the day reduces the amount of blood diverted to digestion at any one time. If you notice drops tend to happen 30 to 60 minutes after eating, this pattern strongly suggests postprandial hypotension, and splitting meals into smaller portions is one of the most effective fixes.
Physical Habits That Prevent Drops
How you get out of bed in the morning can make a real difference. Instead of swinging your legs over and standing up, sit on the edge of the bed for 30 seconds first. Flex your feet and pump your calves a few times to get blood moving before you stand. This is especially important if you tend to feel worst first thing in the morning.
Elevating the head of your bed by 30 to 45 degrees (about 6 to 10 inches at the headboard) can reduce morning drops. Sleeping completely flat allows your kidneys to flush out more fluid and sodium overnight, which leaves you more depleted when you stand up. A slight incline counteracts this cycle.
Compression garments help prevent blood from pooling in your legs and abdomen. Waist-high compression stockings with graded pressure of 30 to 40 mm Hg are the most effective type. Knee-high stockings are easier to put on but do less, because a lot of blood pools in the thighs and abdominal area, not just the calves.
Regular exercise actually improves your body’s ability to regulate blood pressure when you change positions, even though it might seem counterintuitive. Studies in older adults show that consistent physical activity improves the reflexes that keep blood pressure stable during position changes. The key is to avoid exercises with frequent rapid position changes (like burpees or repeated bending) and to stay hydrated throughout. Recumbent bikes, swimming, and seated resistance exercises are good starting points if standing exercise triggers symptoms.
Environmental Triggers to Watch For
Hot and humid conditions make drops worse because heat causes blood vessels to widen, which lowers pressure further. Hot showers and baths are a common trigger that people don’t always connect to their symptoms. If you get dizzy in the shower, try turning the temperature down and keeping a chair nearby. Saunas, hot tubs, and prolonged sun exposure carry the same risk.
Prolonged standing in one place, like waiting in line or standing at a concert, allows blood to pool in your legs with no muscle contractions to push it back up. Shifting your weight, rising onto your toes, and tensing your leg muscles periodically all help. If you know you’ll be standing for a while, wearing compression stockings and pre-loading with water and salt beforehand can prevent an episode before it starts.