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Low blood pressure, or hypotension, occurs when a person's blood pressure measures below 90 for systolic and 60 for diastolic, according to WebMD. Having just one number below these given figures is enough for a person to have hypotension.


Dehydration sometimes causes low blood pressure, according to Mayo Clinic. Dehydration can lead to a life-threatening condition known as hypovolemic shock. The low blood volume reduces the oxygen supply to tissues and, if untreated, can cause death. Other causes include...


Most experts define low blood pressure as a reading lower than 90 for systolic pressure and lower than 60 for diastolic pressure, according to Mayo Clinic. Only one of the numbers needs to be in the low range for the overall blood pressure reading to be considered low.


According to the American Heart Association, there is no formal definition for low blood pressure. Normal blood pressure is 120 over 80 millimeters mercury or less. Unless unpleasant symptoms occur, the lower the blood pressure, the better.


According to the American Heart Association, effects or symptoms of low blood pressure can include dizziness or lightheadedness; fainting; lack of concentration; blurred vision; dehydration; nausea; cold, clammy skin; shallow, rapid breathing; fatigue and depression. In...


Low blood pressure, or hypotension, is not normally a cause for concern, unless the individual has other symptoms. Hypotension is classified as any blood pressure rating lower than 90/60.


Diet and lifestyle changes that can increase blood pressure include eating more salt, avoiding alcoholic beverages, drinking plenty of water, refraining from heavy lifting and engaging in regular exercise to encourage blood flow, according to WebMD. Avoiding hot showers...