Hypertension: When to Go to the Emergency Room
Nearly half of adults in the U.S. have high blood pressure, and many of them don’t know it. For most people, it’s a long-term condition that doesn’t cause any symptoms. But when blood pressure climbs too high too quickly, it can turn into an emergency within hours. That’s why it helps to know the basics of hypertension: when to go to the emergency room, what numbers are dangerous, and which symptoms need care right away.
High blood pressure becomes an emergency when it rises to 180/120 or higher, especially when it comes with other symptoms. Go to the emergency room if you notice any of the following:
- High reading with symptoms (180/120 or higher and you feel unwell)
- Chest pain or pressure
- Trouble breathing
- Severe headache
- Vision changes
- Numbness or weakness
- Confusion or trouble speaking
- Nausea or vomiting
If you notice any of these warning signs, don’t try to wait it out or bring your numbers down on your own. Our team at Complete Care can check your blood pressure, run tests to look for damage to your heart, brain, or kidneys, and start treatment right away. With freestanding ER locations in Texas and Colorado open 24/7 and short wait times, you can get the emergency care you need without the long hospital ER wait.
For life-threatening situations, please call 911.
What is a hypertensive crisis?
A hypertensive crisis is a sudden, severe spike in blood pressure that puts your body at risk of serious harm. It’s different from everyday high blood pressure, which usually builds slowly over many years. When pressure rises this quickly, your blood vessels don’t have time to adjust.
Doctors split a hypertensive crisis into two types. The first is called severe hypertension, and you may also see it called hypertensive urgency. The second is a hypertensive emergency, which means the high pressure has started to harm your organs.
Several things can trigger a sudden spike:
- Missing blood pressure medicine: Skipping doses or stopping your medication suddenly can cause your pressure to shoot back up.
- Medication interactions: Some over-the-counter products, like decongestants and certain pain relievers, can raise blood pressure.
- Drug use: Stimulants such as cocaine and methamphetamine can cause a dangerous jump.
- Kidney problems: Your kidneys help control blood pressure, so kidney disease can make it harder to keep in check.
- Pregnancy complications: A condition called preeclampsia can cause blood pressure to rise quickly during pregnancy or after giving birth. Doctors watch for lower numbers as a warning sign during this time.
A hypertensive crisis can happen to anyone, but it’s most common in people whose high blood pressure isn’t well managed. Regular checkups and taking your medication as prescribed are two of the best ways to lower your risk.
To learn more, please read our article “What is a hypertensive crisis?”
When to go to the ER for high blood pressure above 180/120
A reading above 180/120 doesn’t always mean you need to rush to the ER. The American Heart Association says the right next step depends on whether you have other symptoms. Here’s how to tell the difference:
- No symptoms: Wait at least a minute and check your blood pressure again. If it’s still above 180/120 and you feel fine, call your doctor as soon as possible. They may need to adjust your medication.
- Symptoms: If your reading is high and you have any of the warning signs below, you may be having a hypertensive crisis emergency. This means your blood pressure could be damaging your heart, brain, kidneys, or eyes. Get help right away and don’t wait to see if your numbers come down on their own.
Emergency treatment for a hypertensive crisis usually includes medicine given through an IV to bring your blood pressure down. Doctors lower it slowly on purpose, because dropping it too fast can cause problems of its own. Your care team may also run tests to check for organ damage.
The following hypertensive emergency symptoms mean you should get care right away:
Chest pain or pressure
Chest pain with a very high reading is a sign your heart may be under serious strain. It can point to a heart attack or a tear in the body’s main artery, called an aortic dissection. Pain from an aortic dissection often feels sudden and sharp, and it may spread to your back.
Not every heart attack feels like crushing chest pain. Silent heart attack symptoms can be mild, like discomfort that feels like indigestion, unusual tiredness, or feeling a little short of breath. These are easy to brush off, so take them seriously when your blood pressure is high.
Trouble breathing
Feeling short of breath with high blood pressure can mean your heart is struggling to pump against the pressure. When this happens, fluid can back up into your lungs. You may find it harder to breathe when lying down, or you may start coughing or wheezing. Any sudden trouble breathing needs emergency care.
Severe headache
A sudden, severe headache with a high reading can be a sign of bleeding or swelling in the brain. Many people describe it as the worst headache they’ve ever had. This is very different from a mild tension headache. If the pain comes on fast and feels intense, get help right away.
Vision changes
Very high blood pressure can damage the tiny blood vessels in your eyes. Vision changes can also be a sign of a stroke affecting the part of the brain that controls sight. Watch for blurry vision, double vision, or losing part or all of your vision. These changes can happen suddenly and should never be ignored.
Numbness or weakness
Sudden numbness or weakness, especially on one side of your body, is a common warning sign of a stroke. You might notice one side of your face drooping or have trouble lifting one arm. A stroke needs treatment as fast as possible to limit damage to the brain. Call 911 right away if you notice these signs.
Confusion or trouble speaking
Sudden confusion, slurred speech, or trouble understanding others can mean your brain isn’t getting the blood flow it needs. This can happen during a stroke or when high pressure causes swelling in the brain. A family member or friend often notices these changes first. If someone around you suddenly seems confused or has trouble speaking, call 911.
Nausea or vomiting
Nausea on its own isn’t usually a sign of a blood pressure emergency. But when it comes with a very high reading, it can be a warning sign of pressure building in the brain or even a heart attack. This is especially true if you also have a headache, dizziness, or chest discomfort. Don’t brush it off as a stomach bug.
Hypertensive crisis emergency — FAQs
When to go to the ER for high blood pressure?
Go to the ER if your blood pressure is above 180/120 and you have symptoms like chest pain, trouble breathing, a severe headache, or sudden numbness. These signs can mean your organs are being affected. If your reading is high but you feel fine, recheck it and call your doctor.
Learn more: What is a normal blood pressure reading?
Is blood pressure 180/80 dangerous?
Yes, a top number of 180 is very high, even if the bottom number is normal. Only one of the two numbers needs to be high for your blood pressure to reach a dangerous level. Recheck your reading, and get emergency care if you have any warning signs.
At what point is hypertension an emergency?
Hypertension becomes an emergency when a very high reading comes with signs that your heart, brain, kidneys, or eyes are being harmed. The number alone doesn’t make it an emergency. How you feel is what tells you it’s time to get help.
What will the ER do for hypertension?
The ER team will check your blood pressure several times and ask about your symptoms and medications. They may run tests like bloodwork, an EKG, or imaging to look for organ damage. From there, they’ll give you medicine to bring your blood pressure down safely.
Should I drive myself to the ER if my blood pressure is high?
No, you shouldn’t drive yourself if you have symptoms like chest pain, vision changes, or numbness. These can get worse quickly and make driving unsafe. Call 911 or have someone else take you so you can get help without putting yourself at risk.
Complete Care is ready 24/7 for blood pressure emergencies
Now you know the key parts of hypertension: when to go to the emergency room and which symptoms mean you shouldn’t wait. If your reading is high and something just doesn’t feel right, that’s your cue to get checked out. You know your body best, so trust your gut and don’t talk yourself out of care.
When you need us, Complete Care is here for you 24/7. Our freestanding ERs offer hospital-level emergency care, onsite imaging and labs, and short wait times. Our friendly, emergency-trained physicians and nurses will get to the bottom of your symptoms and help bring your blood pressure back to a safe level. Best of all, you’ll be cared for in a comfortable setting without the long hospital ER wait.
Stop by your nearest Complete Care location in Austin, Corpus Christi, Dallas/Fort Worth, East Texas, Lubbock, San Antonio, or Colorado Springs. We’re always here to help you feel like yourself again.
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Reviewed By:
Jeffrey Peebles, M.D.
Complete Care's health articles are based on evidence-based medical information and reviewed by Dr. Jeffrey Peebles, Medical Director of Complete Care Southlake, to ensure accuracy and alignment with current medical standards.
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