A diastolic blood pressure below 60 mmHg is generally considered low, and raising it involves a combination of fluid intake, dietary changes, physical techniques, and sometimes medication. Normal diastolic pressure falls below 80 mmHg, so the sweet spot you’re aiming for is roughly 60 to 80 mmHg. The strategies that work best depend on whether you need a quick fix for dizziness right now or a longer-term approach to keep your numbers from chronically dropping.
Why Low Diastolic Pressure Matters
Diastolic pressure is the force in your arteries between heartbeats, during the moment your heart relaxes and refills with blood. That resting pressure is what keeps blood flowing through your coronary arteries and into your brain. When it drops too low, those organs can be starved of oxygen.
The risks are real, especially as you get older. Framingham Heart Study data shows that people with diastolic pressure below 70 mmHg who also had stiff arteries faced significantly higher rates of coronary heart disease, heart failure, and stroke compared to those in the 70 to 89 mmHg range. The underlying problem is that stiffening arteries lose their ability to maintain steady blood flow, and low diastolic pressure compounds that by reducing the driving force that pushes blood into small vessels. Symptoms like lightheadedness, fatigue, blurry vision, and fainting are your body telling you perfusion is falling short.
Drink More Water, and Drink It Quickly
One of the simplest ways to raise blood pressure is drinking water. Research published in Circulation found that drinking about 16 ounces (480 mL) of water produces a measurable blood pressure increase within 5 minutes, peaks around 30 to 35 minutes, and lasts over an hour. Drinking that amount in one sitting was more effective than sipping half as much. If your diastolic pressure tends to dip in the morning or after meals, timing a full glass of water before those vulnerable periods can help.
Chronic dehydration is one of the most common and most overlooked causes of low blood pressure. Your blood is mostly water, and when volume drops, pressure drops with it. Aim to drink consistently throughout the day rather than catching up all at once in the evening.
Increase Your Salt Intake Strategically
Most health advice tells people to eat less sodium, but if your diastolic pressure runs low, you may need more. Sodium pulls water into your bloodstream and expands blood volume, which raises pressure. The standard daily limit is 2,300 mg for most adults, but people with chronic low blood pressure are sometimes advised to exceed that. Adding salt to meals, eating salty snacks like olives or broth, or drinking electrolyte beverages can all help. This is one area where working with a healthcare provider matters, since the right sodium target depends on your kidney function and overall cardiovascular health.
Use Caffeine for a Short-Term Boost
A cup of coffee can raise your blood pressure by up to 10 mmHg. The effect kicks in within about 30 minutes and peaks around an hour after drinking it. That makes caffeine a useful tool if your diastolic pressure tends to bottom out at predictable times, like first thing in the morning. The downside is that regular caffeine drinkers build tolerance, so the boost becomes smaller over time. If you don’t normally drink coffee, a single cup will have a more noticeable effect than it would for a habitual drinker.
Physical Maneuvers That Work Immediately
When you feel lightheaded or sense your blood pressure dropping, certain body positions can push blood back toward your heart and brain within seconds. The American Heart Association recommends several of these counterpressure maneuvers:
- Leg crossing with muscle tensing: Cross your legs and squeeze your thigh, abdominal, and buttock muscles. This works lying down or standing.
- Squatting: Drop into a squat while tensing your lower body and abdominal muscles. Stay there until symptoms pass, then stand slowly.
- Hand gripping: Interlock your fingers and pull your hands apart as hard as you can, creating opposing force through your arms.
- Fist clenching: Squeeze your fist at maximum force, with or without an object in your hand.
These aren’t long-term solutions, but they can prevent a faint or buy you time to sit down and hydrate. If you find yourself relying on them frequently, that’s a signal your baseline pressure needs attention through the other strategies here.
Compression Garments
Waist-high compression stockings prevent blood from pooling in your legs, which is one of the main reasons diastolic pressure drops when you stand. Dysautonomia specialists typically recommend stockings rated at 20 to 30 mmHg or 30 to 40 mmHg of compression. Knee-high stockings are easier to wear but less effective, because a large share of blood pools in the thighs and abdomen. Full-length, waist-high garments make the biggest difference. They’re especially useful if your blood pressure drops primarily when you’re upright for extended periods.
Exercise Choices That Help
Exercise is complicated territory for low diastolic pressure. In the long run, regular cardiovascular exercise improves your body’s ability to regulate blood pressure. But certain types of exercise actually lower blood pressure more than others, which isn’t what you want if yours is already low.
A large review of 270 trials covering nearly 16,000 people found that isometric exercises (static holds like wall sits and planks) produced the most significant reductions in both systolic and diastolic blood pressure. That means isometric training might not be ideal if your goal is raising diastolic numbers. Moderate aerobic exercise like walking, cycling, or swimming tends to be better tolerated and improves the cardiovascular fitness that helps your body maintain pressure during position changes. If you do strength train, dynamic movements (where your muscles move through a range of motion) are a better fit than long static holds.
Medications for Persistent Low Pressure
When lifestyle changes aren’t enough, two types of medication are commonly used. One works by increasing blood volume, essentially doing what salt and water do but more powerfully and consistently. The other works by narrowing blood vessels so they can’t expand as much, which physically raises the pressure inside them. Both are typically prescribed for orthostatic hypotension, the type of low blood pressure that worsens when you stand up. These medications come with side effects and require monitoring, so they’re reserved for cases where low pressure is causing symptoms that interfere with daily life.
Eating Patterns That Stabilize Pressure
Large meals pull blood toward your digestive system, which can cause diastolic pressure to drop for one to two hours afterward. Eating smaller, more frequent meals reduces that shift. Limiting refined carbohydrates at meals also helps, since high-carb meals tend to cause a more pronounced post-meal blood pressure dip. Pairing carbohydrates with protein, fat, or fiber slows digestion and blunts the effect.
Alcohol relaxes blood vessel walls and can lower diastolic pressure, so reducing or avoiding it is worth considering if your numbers are already low. Even moderate amounts can produce a noticeable dip in someone prone to hypotension.