Low blood sugar, also known as hypoglycemia, is defined as blood sugar levels of 70 milligrams per deciliter (mg/dL) or lower. Symptoms of low blood sugar can include tiredness, sweating, and tingling lips. High blood pressure, also called hypertension, can also be a sign of low blood sugar. Show
Low blood sugar is especially common in people with type 1 diabetes, in which the pancreas creates little or no insulin. However, it can also occur in people with type 2 diabetes who take insulin or certain medications.  Terry Vine / Getty Images Low Blood Sugar Can Increase Blood PressureOur body gets its energy to function properly from glucose, which is found in the carbohydrates we take in from the foods we eat. Insulin is responsible for pulling glucose from the bloodstream into cells, where it's used for energy. When our blood sugar levels are low, our body tries to keep essential organs working by causing various changes, including an increase in heart rate and peripheral systolic blood pressure (pushing blood and nutrients back toward the lungs and heart). It also lowers central blood pressure (pushing blood and nutrients away from the heart to the limbs and smaller blood vessels). Long-Term Effects of Low Blood SugarRepeat episodes of low blood sugar can cause permanent changes to blood pressure and increase the risk of hypertension in people with diabetes. Low blood sugar may also lead to long-term cognitive (intellectual) changes, cardiac arrhythmia (irregular heart rhythm), and heart attacks. High blood pressure is the most common risk factor for stroke. It is also known to increase the risk of brain, heart, and kidney problems. Organ damage and cognitive dysfunction may also occur. Therefore, if hypertension remains unmanaged, serious events like stroke, heart attack, kidney failure, and dementia may occur. Hypertension causes the arterial walls to experience an untenable amount of pressure, which results in the heart needing to work harder to pump blood. This can damage the heart muscle. A small study of 22 people with type 1 diabetes linked low blood sugar to high blood pressure and found that hypoglycemia may lead to hypertension over time. Symptoms of High Blood PressureShort-term high blood pressure that’s caused by low blood sugar may increase heart rate. Other than that, high blood pressure is usually not accompanied by any warning signs or symptoms. The only way to know whether you have high blood pressure is by monitoring it. How to Avoid Low Blood SugarHere are some tips for avoiding low blood sugar:
Sometimes, low blood sugar occurs even when you try to prevent it. Therefore, it's a good idea to carry glucose tablets or other fast-acting carbohydrates, such as half a banana or a couple tablespoons of raisins. The 15–15 rule can help you raise your blood sugar slowly. It involves eating 15 grams (g) of fast-acting carbohydrates and checking your blood sugar levels after 15 minutes. If your blood sugar is not responding to the carbohydrates within 15 minutes, repeat the steps until your blood sugar is in your target range. It may be necessary to call your doctor or seek emergency medical help right away if you can't get your blood sugar under control. Preventing low blood sugar is an important part of preventing hypertension, but it is not the only way. Talk to your healthcare provider about unique risk factors that may impact how you approach both blood sugar and blood pressure. A Word From VerywellManaging low blood sugar and high blood pressure can be stressful. However, it does not need to consume your entire life. There are many steps you can take to reduce your stress and the impact your diagnosis and the resulting anxiety may have on your life. For example, you may want to look into recipes that help lower your high blood pressure and ways to manage your blood sugar to ensure it is at a healthy level. Look for manageable steps you can take, and walk through them with your healthcare provider. Together, you can confirm you are on the right track to managing your low blood sugar and the resulting high blood pressure. Frequently Asked Questions
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
Thanks for your feedback! Are blood sugar and blood pressure related?The same is true if the blood sugar goes too low; the catecholamine response is the first thing that the body uses to compensate, and this will raise blood pressure in the aftermath. This is how low blood sugar or low blood pressure can cause the other to go high.
What is the difference between blood pressure and diabetes?Diabetes damages arteries and makes them targets for hardening, called atherosclerosis. That can cause high blood pressure, which if not treated, can lead to trouble including blood vessel damage, heart attack, and kidney failure.
Does high blood pressure mean high blood sugar?High blood pressure, or hypertension, often occurs alongside diabetes and obesity. Together, these conditions fall under the umbrella of metabolic syndrome. People with metabolic syndrome are at an increased risk for cardiovascular diseases. Hypertension and diabetes share a number of common causes and risk factors.
What is the normal level of sugar and blood pressure?A fasting blood sugar level less than 100 mg/dL (5.6 mmol/L) is normal. A fasting blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes. If it's 126 mg/dL (7 mmol/L) or higher on two separate tests, you have diabetes.
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Whats the difference between blood sugar and blood pressure
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