what happens when your blood pressure drops low?
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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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In patients with symptomatic low blood pressure, there often is a marked drop in blood pressure upon standing, and patients may even develop orthostatic symptoms. The heart rate often increases.
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Low blood pressure may be a sign of multiple conditions, including dehydration, severe infection with septic shock, endocrine (hormonal) conditions, some heart diseases, and taking certain medications. Psychological stress is not a known cause of abnormally low blood pressure.
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When blood loss nears 30 to 40 percent of total blood volume, your body will have a traumatic reaction. Your blood pressure will drop down even further, and your heart rate will further increase. You may show signs of obvious confusion or disorientation. Your breathing will be more rapid and shallow.
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Generally, low blood pressure during pregnancy isn't a cause for concern unless you experience symptoms. Big drops may be the sign of a serious, or even life-threatening, problem. Extremely low blood pressure can lead to falls, organ damage, or shock.
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For some people, low blood pressure signals an underlying problem, especially when it drops suddenly or is accompanied by signs and symptoms such as: Dizziness or lightheadedness. Fainting. Blurred or fading vision.
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Low blood pressure might seem desirable, and for some people, it causes no problems. However, for many people, abnormally low blood pressure (hypotension) can cause dizziness and fainting.
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Some experts define low blood pressure as readings lower than 90 mm Hg systolic or 60 mm Hg diastolic. If either number is below that, your pressure is lower than normal.
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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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['Dizziness or lightheadedness.', 'Nausea.', 'Fainting (syncope)', 'Dehydration and unusual thirst.', 'Dehydration can sometimes cause blood pressure to drop. ... ', 'Lack of concentration.', 'Blurred vision.']
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Low blood pressure, or hypotension, is not often considered to be a major problem. However, severe hypotension can indicate an underlying problem, and it can lead to serious heart disorders and organ failure, because oxygen and nutrients may not reach key organs.
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When you give blood, your blood pressure can drop or your heart rate can slow down suddenly, and sometimes your body reacts to that. You might feel faint, nauseous, or light-headed or, in some cases, lose consciousness. Just remember that it isn't uncommon and can happen to anyone - even experienced donors!
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Most doctors will only consider chronically low blood pressure as dangerous if it causes noticeable signs and symptoms, such as: Dizziness or lightheadedness. Nausea. Fainting (syncope)
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['Dizziness or lightheadedness.', 'Nausea.', 'Fainting (syncope)', 'Dehydration and unusual thirst.', 'Dehydration can sometimes cause blood pressure to drop. However, dehydration does not always cause low blood pressure. ... ', 'Lack of concentration.', 'Blurred vision.', 'Cold, clammy, pale skin.']
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But health problems can occur when blood pressure drops suddenly and the brain is deprived of an adequate blood supply. This can lead to dizziness or lightheadedness. Sudden drops in blood pressure most commonly occur in someone who's rising from a lying down or sitting position to standing.
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Low blood pressure can affect other organs leading to shortness of breath, fainting, blacking out, chest pain, and cool, clammy skin.
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Low blood pressure from faulty brain signals (neurally mediated hypotension). This disorder, which causes a blood pressure drop after standing for long periods, mostly affects young adults and children. It seems to occur because of a miscommunication between the heart and the brain.