Low blood pressure is generally considered a blood pressure reading lower than 90 millimeters of mercury (mm Hg) for the top number (systolic) or 60 mm Hg for the bottom number (diastolic). Show What's considered low blood pressure for one person might be OK for someone else. Low blood pressure might cause no noticeable symptoms, or it might cause dizziness and fainting. Sometimes, low blood pressure can be life-threatening. The causes of low blood pressure range from dehydration to serious medical conditions. It's important to find out what's causing low blood pressure so that it can be treated, if necessary. TypesTypes of low blood pressure include:
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SymptomsLow blood pressure (hypotension) symptoms may include:
For some people, low blood pressure may be a sign of an underlying health condition, especially when it drops suddenly or occurs with symptoms. A sudden fall in blood pressure can be dangerous. A change of just 20 mm Hg — a drop from 110 mm Hg systolic to 90 mm Hg systolic, for example — can cause dizziness and fainting. And big drops, such as those caused by uncontrolled bleeding, severe infections or allergic reactions, can be life-threatening. Extreme low blood pressure can lead to a condition known as shock. Symptoms of shock include:
When to see a doctorIf you have symptoms of extreme low blood pressure (hypotension) or shock, seek emergency medical help. Most health care providers consider blood pressure to be too low only if it causes symptoms. Occasional minor dizziness or lightheadedness can be caused by many things, such as spending too much time in the sun or in a hot tub. It's important to see a health care provider to get a correct diagnosis. If you have consistently low blood pressure readings but feel fine, your provider may just monitor you during routine health checkups. It can be helpful to keep a record of your symptoms, when they occur and what you're doing at the time. Request an Appointment at Mayo Clinic There is a problem with information submitted for this request. Review/update the information highlighted below and resubmit the form. Sign up for free, and stay up to date on research advancements, health tips and current health topics, like COVID-19, plus expertise on managing health. Email ErrorEmail field is required ErrorInclude a valid email address Learn more about Mayo Clinic’s use of data.To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and website usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. When should you worry about the bottom number of blood pressure?Over time, isolated diastolic hypotension can cause heart failure. In fact, it may be one of the most common causes of heart failure. Pay attention to your diastolic number when you have your blood pressure checked. If your lower number is 60 or below, ask a healthcare professional about it.
What factors affect diastolic blood pressure?The factors discussed are heart rate, arterial pressure, coronary perfusion pressure, the pericardium, and the mechanical interplay between ventricles. The influence of heart rate, arterial pressure, and coronary perfusion pressure can be considered as minor provided they remain within their normal physiological range.
How do you reduce the bottom number of your blood pressure?Follow the 20 tips below to help lower your overall blood pressure, including diastolic blood pressure.. Focus on heart-healthy foods. ... . Limit saturated and trans fats. ... . Reduce sodium in your diet. ... . Eat more potassium. ... . Lay off the caffeine. ... . Cut back on alcohol. ... . Ditch sugar. ... . Switch to dark chocolate.. |
What affects the bottom number of blood pressure
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