If your blood pressure reading is high, what you should do depends on how high it is and whether you’re experiencing symptoms. A reading of 180/120 or above with symptoms like chest pain, shortness of breath, or blurred vision is a medical emergency. For readings below that threshold, there are practical steps you can take right now and over the coming days to bring your numbers down.
Check Whether It’s a True Emergency
The critical number to know is 180/120. If either your top number (systolic) is 180 or higher, or your bottom number (diastolic) is 120 or higher, and you’re also experiencing any of the following symptoms, call 911 immediately:
- Chest pain
- Shortness of breath
- Severe headache
- Blurred vision
- Numbness or tingling in the face, arm, or leg
- Trouble speaking or walking
- Seizures
These symptoms can signal that the extreme pressure is actively damaging your heart, brain, or kidneys. This is called an emergency hypertensive crisis, and it requires hospital treatment to lower your pressure in a controlled way.
If your reading is 180/120 or above but you feel fine, don’t panic. Wait five minutes, sit quietly, and retake the measurement. If it’s still that high, contact your doctor or an urgent care provider the same day. Without symptoms, this is classified as hypertensive urgency rather than an emergency, meaning no organ damage is occurring yet, but the reading still needs medical attention soon.
Make Sure Your Reading Is Accurate
A single high reading doesn’t always mean your blood pressure is truly elevated. Poor measurement technique can inflate your numbers significantly. Before you worry, retake the reading following these steps from the American Heart Association:
- Rest first. Sit quietly for at least five minutes. Don’t talk, scroll your phone, or move around.
- Position your arm correctly. Rest it on a flat surface at heart level. Use a pillow under your arm if needed. The cuff should sit on bare skin, directly above the bend of your elbow.
- Avoid common triggers. Caffeine, smoking, and exercise within 30 minutes before measuring can all raise your reading temporarily.
- Take two readings. Measure once, wait one minute, then measure again. Use the average of both.
Taking readings at the same time each day gives you the most consistent picture. One elevated reading at a stressful moment is very different from consistently high numbers across a week.
Know Where Your Numbers Fall
The 2025 guidelines from the American Heart Association and American College of Cardiology define blood pressure in four categories. Normal is below 120/80. Elevated blood pressure is 120 to 129 systolic with a bottom number still under 80. Stage 1 hypertension is 130 to 139 systolic or 80 to 89 diastolic. Stage 2 hypertension is 140/90 or higher.
If your numbers fall in the elevated or Stage 1 range, lifestyle changes alone can often bring them back to normal. Stage 2 typically involves medication alongside those same changes. Understanding your category helps you have a more productive conversation with your doctor about next steps.
What to Do Right Now
You can’t dramatically lower your blood pressure in the next ten minutes, and you shouldn’t try. Rapid drops can be dangerous. But a few things can help bring a temporarily high reading down over the next 15 to 30 minutes.
Slow, deep breathing is the most immediate tool you have. Practicing slow breathing for about 15 minutes can lower systolic pressure by up to 10 points in people with high blood pressure. The mechanism is straightforward: deep breathing activates your body’s relaxation response, which widens blood vessels and slows your heart rate. Try inhaling slowly through your nose for four counts, holding briefly, and exhaling for a longer count through your mouth. Repeat for 10 to 15 minutes.
Stress is one of the most common reasons for a suddenly high reading. When you’re stressed, your body releases hormones that make your heart beat faster and your blood vessels constrict. Once the stressor passes, blood pressure typically returns to baseline. If you got a high reading during an anxious moment, at work, or after an argument, the reading may reflect that situation more than your overall cardiovascular health.
Drink a glass of water. Dehydration raises sodium concentration in your blood, which triggers a hormone that constricts blood vessels and pushes pressure up. Rehydrating won’t produce an instant fix, but it addresses one possible contributor.
Lifestyle Changes That Lower Blood Pressure
If your readings have been consistently high, these are the changes with the strongest evidence behind them.
Reduce Sodium, Increase Potassium
The average American consumes over 3,400 milligrams of sodium per day, well above the recommended limit of less than 2,300 milligrams. Cutting sodium lowers blood pressure reliably. The biggest sources aren’t the salt shaker but processed foods, restaurant meals, bread, deli meats, and canned soups. Reading nutrition labels and cooking more at home are the most practical ways to cut back.
Potassium works as sodium’s counterbalance. It helps your kidneys flush excess sodium and relaxes blood vessel walls. Bananas get all the credit, but potatoes, beans, spinach, yogurt, and avocados are all rich sources. Increasing your potassium intake can meaningfully lower blood pressure if it’s currently high.
Move More, Even a Little
You don’t need intense workouts to see a benefit. Research from Harvard Health found that replacing just five minutes of sedentary time with light exercise each day lowered systolic pressure by nearly a point. That’s a modest number on its own, but consistent daily movement adds up. A 20- to 30-minute walk most days is one of the most effective non-drug interventions for blood pressure.
Build a Breathing Practice
Beyond using breathing as a one-time tool when your reading spikes, building a daily practice produces lasting results. A well-designed study published in the Journal of the American Heart Association found that doing 30 resistance breaths per day (breathing in against a resistance device) for six days a week reduced systolic blood pressure by an average of 9 points within six weeks. Even without a device, daily slow breathing practice has measurable effects over time.
Tracking Your Numbers for Your Doctor
If you’re seeing elevated readings at home, the most useful thing you can do before your next appointment is keep a log. Write down the date, time, and both numbers for each reading. Take measurements at the same time daily, ideally morning and evening, and note anything that might have influenced the reading: stress, a big meal, caffeine, poor sleep.
This log gives your doctor a much clearer picture than a single office reading, which can be artificially high from the stress of the visit itself. It also helps answer the key questions that guide treatment decisions: how high your readings typically are, whether they’re consistently elevated or only spiking occasionally, and whether they’re trending up or staying stable.
If you don’t own a home monitor, validated upper-arm cuff monitors are widely available at pharmacies for $30 to $60. Wrist monitors are less accurate. Skip finger monitors entirely.