what happens to your body when you have low blood pressure?
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Even moderate forms of low blood pressure can cause dizziness, weakness, fainting and a risk of injury from falls. And severely low blood pressure can deprive your body of enough oxygen to carry out its functions, leading to damage to your heart and brain.
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Low blood pressure, or hypotension, is blood pressure that has dropped below healthy levels. It can be caused by dehydration, certain medical conditions and medications, and surgery. It can cause dizziness, blurred vision, headache, and fainting.
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Signs of high or low blood pressure like very bad headache or dizziness, passing out, or change in eyesight. Trouble breathing, slow breathing, or shallow breathing. Slow heartbeat. Trouble controlling body movements, twitching, change in balance, trouble swallowing or speaking.
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Long-term high blood pressure can potentially lead to low pulse. High blood pressure can cause your heart's tissues to remodel. For example, the tissue may become thicker in an attempt to beat harder. It's harder for this thickened tissue to conduct electrical impulses.
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Chronically low blood pressure is worrisome when it is accompanied by symptoms such as dizziness or fainting. This can be a sign of an underactive or overactive thyroid gland, poorly functioning adrenal glands, anemia, mild dehydration, a low heart rate, and other conditions.
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But if your blood pressure drops suddenly or causes symptoms like dizziness or fainting, it is too low. It can cause shock. Shock can be dangerous if it is not treated right away. Blood pressure is a measure of how hard the blood pushes against the walls of your arteries as it moves through your body.
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Blood pressure might drop if someone is having a heart attack because the heart is too weak to maintain it, as the muscle might have been damaged. The severe pain a person might feel during a heart attack could also trigger an automatic response, which might lead to decreased blood pressure and fainting.
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Long-term high blood pressure can potentially lead to low pulse. High blood pressure can cause your heart's tissues to remodel. For example, the tissue may become thicker in an attempt to beat harder.
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There are different types and causes of low blood pressure. Severe hypotension can be caused by sudden loss of blood (shock), severe infection, heart attack, or severe allergic reaction (anaphylaxis). Orthostatic hypotension is caused by a sudden change in body position.
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Generally, stress raises blood pressure, so many believe the main (or only) likely cause of low blood pressure is poor breathing. But there may be other causes. Often, after periods of intense anxiety, the body is left feeling very fatigued, and this can contribute to low blood pressure in people.
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If your blood pressure is lower than 90/60, you have low blood pressure, or hypotension. You may feel lightheaded, weak, dizzy, or even faint. Low blood pressure can be caused by not drinking enough liquids (dehydration), blood loss, some medical conditions, or too much medication.
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If either number is below that, your pressure is lower than normal. A sudden fall in blood pressure can be dangerous. A change of just 20 mm Hg — a drop from 110 systolic to 90 mm Hg systolic, for example — can cause dizziness and fainting when the brain fails to receive enough blood.
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The body quickly responds to the low blood volume and pressure by the following adjustments, which all increase blood pressure: The heart rate increases and the forcefulness of the heart's contractions increase, pumping more blood through the heart. Veins narrow to return more blood to the heart for pumping.
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Low blood pressure after eating (postprandial hypotension). Blood flows to your digestive tract after you eat. Ordinarily, your body increases your heart rate and constricts certain blood vessels to help maintain normal blood pressure. But in some people these mechanisms fail, leading to dizziness, faintness and falls.
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Postural (orthostatic) hypotension is when your blood pressure drops when you go from lying down to sitting up, or from sitting to standing. When your blood pressure drops, less blood can go to your organs and muscles. This can make you more likely to fall, and falls can be dangerous.
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If your blood vessels and heart don't respond correctly to the extra blood directed to your digestive system, blood pressure everywhere but the digestive system will decrease.
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(Hypotension) Low blood pressure is blood pressure low enough to cause symptoms such as dizziness and fainting. Very low blood pressure can cause damage to organs, a process called shock.