Blood pressure below 90/60 mmHg is considered low, and raising it usually involves a combination of fluids, salt, physical habits, and sometimes medication. Most strategies work by increasing blood volume or helping your blood vessels maintain tension. The right approach depends on whether your drops are occasional or chronic, but several effective options don’t require a prescription.
Drink Water Quickly
One of the fastest ways to raise blood pressure is simply drinking water. Research published by the American Heart Association found that drinking about 16 ounces (480 mL) of tap water as quickly as comfortable produced a measurable rise in blood pressure within 30 minutes. The effect was dose-dependent: 16 ounces caused a greater increase than 8 ounces. Water triggers the sympathetic nervous system, the same fight-or-flight response activated by caffeine or nicotine, which tightens blood vessels and pushes pressure up.
This makes a glass or two of water a useful first move when you feel lightheaded or notice symptoms of a drop. Keep water nearby throughout the day, especially in the morning when blood pressure tends to be lowest.
Increase Your Salt Intake
Salt helps your body hold onto water, which increases the total volume of blood circulating through your vessels. For people with orthostatic hypotension (pressure drops when standing), medical guidelines recommend significantly more sodium than the general population typically consumes. The American Society of Hypertension suggests 2,400 to 4,000 mg of sodium per day for people with orthostatic issues. Some guidelines go higher, with the Heart Rhythm Society recommending 4,000 to 4,800 mg of sodium daily for people with conditions like POTS.
A practical way to increase sodium is adding 1,000 to 2,000 mg to your diet with each meal through salted foods, broth, or electrolyte drinks. One study found that about 2,400 mg of extra sodium per day for two months improved both blood vessel control and the ability to tolerate standing in people who were previously passing out from positional changes. If your doctor has confirmed low blood pressure is your issue (and not high blood pressure or heart disease), deliberately salting your food is one of the simplest long-term strategies.
Use Physical Counterpressure Maneuvers
When you feel a blood pressure drop coming on, certain body positions can squeeze blood back toward your heart and brain within seconds. The American Heart Association recommends these specific techniques:
- Cross your legs and squeeze. While standing or lying down, cross your legs and tense your thigh, abdominal, and buttock muscles simultaneously.
- Squat down. Lowering into a squat compresses your leg veins and forces blood upward. Tense your lower body and abdomen while squatting, then stand slowly once symptoms pass.
- 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 quickly.
- Clench your fists. Make a tight fist, with or without gripping a small object, and hold the contraction.
These maneuvers are especially useful in situations where you can’t sit down immediately, like standing in line or waiting for a bus. They buy your body time to stabilize.
Get Up Slowly and Strategically
Blood pressure often drops most sharply when transitioning from lying down to standing. The Mayo Clinic recommends a deliberate sequence: stretch and flex your calf muscles before sitting up, sit on the edge of the bed for a full minute before standing, and once upright, march in place or rise onto your tiptoes to activate your leg muscles. If symptoms appear after standing, squeeze your thighs together and tighten your stomach and buttock muscles.
This approach gives your blood vessels time to constrict and redirect blood against gravity. Rushing from bed to standing bypasses those reflexes, which is why morning dizziness is so common in people with low blood pressure.
Adjust How You Eat
Blood pressure naturally dips after meals because your body diverts blood flow to your digestive system. Large meals with lots of carbohydrates cause the biggest drops. Cleveland Clinic recommends eating six smaller meals throughout the day instead of three large ones and keeping those meals low in carbohydrates. This reduces the volume of blood diverted to digestion at any one time and smooths out the pressure swings that can cause dizziness or fainting after eating.
If you notice you feel worst after lunch or dinner, the meal itself may be part of the problem. Try splitting your usual portion in half and eating the second half an hour or two later.
Try Caffeine
Caffeine temporarily raises blood pressure by 5 to 10 points in people who don’t drink it regularly. The effect kicks in within 30 minutes and can last up to two hours. A cup of coffee or tea before meals or before activities that tend to trigger symptoms can provide a useful short-term boost.
The catch is that regular caffeine drinkers build tolerance, so the blood pressure effect diminishes over time. If you already drink several cups a day, adding another is unlikely to help much. For occasional use, though, caffeine is a practical tool, particularly before situations where you’ll be standing for long periods.
Wear Compression Garments
Compression stockings prevent blood from pooling in your legs, which is one of the main reasons blood pressure drops when you stand. Most experts in autonomic disorders recommend waist-high compression 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 a significant amount of blood pools in the thighs and abdomen, not just the calves.
These garments work best when combined with other strategies. Wearing them during the day (especially in the morning, when symptoms tend to be worst) and removing them at night is the standard approach. They can feel tight and warm, so many people reserve them for days when they’ll be upright and active for extended periods.
Prescription Medications
When lifestyle changes aren’t enough, doctors can prescribe medications that raise blood pressure through different mechanisms. Fludrocortisone is a synthetic steroid that increases blood volume and improves the ability of blood vessels to respond to position changes. Midodrine works by directly tightening blood vessels. Both are commonly prescribed for orthostatic hypotension.
These medications are typically reserved for people whose low blood pressure significantly affects daily life, causes repeated fainting, or doesn’t respond to the non-drug approaches above. They come with side effects and require monitoring, so they’re not a first-line option for mild or occasional symptoms.
Signs of a Serious Drop
Occasional lightheadedness when standing up quickly is common and usually manageable with the strategies above. But blood pressure that drops suddenly and severely can reduce blood flow to vital organs. Confusion, cold or clammy skin, rapid shallow breathing, blurred vision, or fainting that doesn’t resolve quickly all signal that something more serious may be happening, whether from dehydration, blood loss, infection, or a heart problem. These symptoms need immediate medical evaluation, not home remedies.