If your blood pressure is high, your first step depends on how high it is and whether you have symptoms. A reading above 180/120 with symptoms like chest pain, vision changes, or severe headache is a medical emergency requiring a 911 call. A reading in the 130s to 170s range, especially without symptoms, calls for a different response: confirm the reading is accurate, take steps to bring it down, and follow up with a healthcare provider.
Know Your Numbers
Blood pressure falls into distinct categories based on the 2025 guidelines from the American Heart Association:
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic or 90 or higher diastolic
- Severe hypertension: above 180/120
If your systolic and diastolic numbers fall into different categories, the higher category applies. A single high reading doesn’t mean you have hypertension. Diagnosis typically requires two or more elevated readings taken at separate appointments. But a single high reading is still worth paying attention to, especially if it’s significantly above normal.
When to Call 911
A reading of 180/120 or higher combined with any of the following symptoms means you should call emergency services immediately: chest pain, sudden vision changes or eye pain, slurred speech, sudden weakness in your face or arms, severe headache, dizziness, seizures, confusion, or heart palpitations. These symptoms suggest your organs may be taking damage from the pressure, and minutes matter.
If your reading is above 180/120 but you feel completely fine, wait five minutes, sit quietly, and recheck. If it’s still that high, contact your doctor or an urgent care line for guidance, even without symptoms.
Make Sure Your Reading Is Accurate
A surprising number of high readings come down to measurement error. Before you worry, retake your blood pressure using proper technique. Sit at a table with your back supported against the chair and your feet flat on the floor (not crossed). Rest quietly for three to five minutes before measuring. Place your arm on the table so it’s level with your heart, palm facing up. Stay still and silent while the cuff inflates.
After the first reading, wait one to two minutes, then take a second. If the two readings differ significantly, take a third. Talking, a full bladder, crossed legs, or an unsupported arm can each inflate your reading by 5 to 15 points. Caffeine and exercise within the last 30 minutes can also skew results.
Bring It Down Right Now With Breathing
If your reading is elevated but not in the emergency range, slow breathing is one of the few things that can lower your blood pressure within minutes. The goal is six to ten breaths per minute, with a longer exhale than inhale. Practiced regularly for 15 minutes a day, this technique can reduce your systolic pressure (the top number) by up to 10 points.
Two patterns work well. The 4-7-8 method has you inhale for four counts, hold for seven, and exhale for eight through pursed lips, as if blowing out candles. Box breathing is simpler: inhale for four counts, hold for four, exhale for four, hold for four, and repeat. You can also try belly breathing, where you focus on expanding your diaphragm rather than your chest. Any of these will activate your body’s relaxation response and ease pressure on your blood vessels.
If You Missed Your Medication
A skipped dose of blood pressure medication is one of the most common reasons for a sudden spike. If you realize you missed a dose, take it as soon as you remember, as long as your next scheduled dose isn’t due within a few hours. If you take your medication more than twice a day, skip the missed dose entirely and pick up at the next scheduled time. Never double up to compensate for a missed dose.
Going forward, linking your medication to an existing habit (like brushing your teeth or eating breakfast) makes it harder to forget. A pill organizer or phone alarm also helps.
Lifestyle Changes That Lower Blood Pressure
Exercise
Regular aerobic exercise is one of the most effective non-drug tools for reducing blood pressure. The target is 150 minutes per week of moderate activity like brisk walking, cycling, or swimming. You don’t need to do it all at once. Three 10-minute sessions throughout the day provide the same benefit as one 30-minute block. The key is consistency across most days of the week, not intensity.
Sodium and Diet
Sodium has a direct, dose-dependent effect on blood pressure. The general recommendation is to stay under 2,300 mg per day, but cutting to 1,500 mg per day lowers blood pressure even further. For context, a single fast-food meal can easily contain 1,500 mg or more. The biggest sources are restaurant food, processed snacks, canned soups, deli meats, and bread.
The DASH eating plan, developed specifically for blood pressure management, emphasizes fruits, vegetables, whole grains, lean protein, and low-fat dairy while limiting saturated fat and added sugars. You don’t need to overhaul your diet overnight. Swapping one processed meal per day for a home-cooked one and reading sodium labels at the grocery store are practical starting points.
Minerals That Help
Potassium and magnesium both contribute to healthy blood pressure. Magnesium at doses up to 360 mg per day has been shown to reduce systolic pressure by about 3 points. Potassium has a similar effect. You can get both through food: bananas, sweet potatoes, spinach, beans, and avocados are rich in potassium, while nuts, seeds, dark chocolate, and leafy greens provide magnesium. If you’re considering supplements, talk to your provider first, since both minerals can interact with certain medications, especially those that affect kidney function.
Check for Underlying Causes
Sometimes high blood pressure is driven by a separate, treatable condition. The most common culprit is obstructive sleep apnea. If you snore heavily, wake frequently at night, have night sweats, or feel exhausted during the day despite sleeping enough hours, sleep apnea is worth investigating. Treating it often brings blood pressure down on its own.
Kidney problems, thyroid disorders (both overactive and underactive), and hormone-producing tumors can also cause high blood pressure that doesn’t respond well to standard treatment. These are less common but important to rule out if your blood pressure stays elevated despite lifestyle changes and medication.
Several medications and substances can quietly raise your blood pressure as well. Common offenders include NSAIDs (like ibuprofen), decongestants found in cold medicines, oral contraceptives, corticosteroids like prednisone, and certain antidepressants. Alcohol, nicotine, and some herbal supplements can also contribute. If you started a new medication around the time your blood pressure climbed, that connection is worth raising with your provider.
What Happens at the Doctor’s Office
Your provider will want to confirm that your high readings aren’t a one-time event. Expect to have your blood pressure checked at two or more separate visits before receiving a formal diagnosis. Some providers will ask you to track readings at home over one to two weeks to get a clearer picture of your typical numbers, since many people read higher in a clinical setting (a phenomenon called white coat hypertension).
For Stage 1 hypertension (130s/80s), the initial approach is usually lifestyle changes alone, with a follow-up in a few months to check progress. For Stage 2 (140+/90+), medication is more likely to be part of the plan from the start, alongside the same diet and exercise recommendations. The goal for most people is to get below 130/80 and keep it there consistently.