If a cause can be found, a GP will be able to recommend treatment to ease your symptoms. Medicine to increase blood pressure is rarely needed because simple lifestyle measures or treating the underlying cause is usually effective. Your blood pressure can vary depending on the time of day. It gradually increases throughout the day. There are many possible causes of low blood pressure. A blood pressure reading contains two numbers: systolic pressure and diastolic pressure.
Systolic pressure is the top, or first, number in your blood pressure reading ; it indicates the pressure within your arteries when your heart pumps out blood. Diastolic pressure is the bottom number, showing the pressure in your arteries while your heart is filling with blood. Some adults regularly have blood pressure in the hypotensive range but have no symptoms and do not require treatment.
In serious cases, though, hypotension can result in a decreased supply of oxygen and nutrients to your brain and other essential organs, which can eventually lead to life-threatening shock.
Most doctors do not consider hypotension a problem unless it is associated with certain signs and symptoms:. According to the AHA, there is no specific number at which day-to-day blood pressure is considered too low. However, when low blood pressure is accompanied by any of the above listed dangerous symptoms, it is time to seek medical care.
Some people have naturally low blood pressure, and they don't experience any symptoms. But for those who are used to having high blood pressure, a sudden decrease in blood pressure can signal a problem and can cause the symptoms listed above.
Low blood pressure can cause fatigue — that feeling of overwhelming tiredness and lack of energy. Research has found an association between low blood pressure and chronic fatigue syndrome , a condition characterized by profound fatigue, pain, and sleep abnormalities that are often made worse by exertion.
Factors that lower blood pressure can vary from person to person. In some cases, being dehydrated is enough to cause a dip. For others, certain medicines can lower pressure.
Other things that can affect blood pressure include:. However, if your blood pressure drops suddenly or you experience symptoms, it may cause serious side effects. The U. National Library of Medicine indicates that a drop as little as 20 mmHg can cause problems. So what causes your blood pressure to drop and when does it put you at risk? Minor and temporary things can affect blood pressure, like getting up too fast after sitting, standing for long periods of time, or dehydration.
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