Low Blood Pressure: Is Your Reading Normal?

Hypotension

Hello Dr.
Tsai, my normal blood pressure is 120/60.
However, for the past six months, I have been measuring my blood pressure at home and the readings have been between 90-70/55-40.
Is this normal?

qǐ é, 30~39 year old female. Ask Date: 2006/09/05

Dr. Cai Jueren reply Family Medicine

Hello, your blood pressure should be normal, so there is no need to worry.
It is common for most slender girls to have slightly lower blood pressure, which is a normal phenomenon and shouldn't be overly concerning.
Typically, you only need to see a doctor if your blood pressure drops to a level where you experience symptoms such as dizziness, chest tightness, or weakness, among others.
If you are taking medications that can affect blood pressure and you are experiencing the aforementioned blood pressure readings, that would be abnormal.
In that case, you should consult your primary care physician to discuss whether you need to change or discontinue your medication.
Thank you for your inquiry, and I hope the above information helps resolve your concerns.
Hualien Hospital, Dr.
Tsai Jue-Ren.

Reply Date: 2006/09/05

More Info

Hello! Thank you for your question regarding low blood pressure readings. Based on the values you've provided, it appears that your blood pressure readings are significantly lower than the typical normal range, which is generally considered to be around 120/80 mmHg. Your readings of 90/70 mmHg and 55/40 mmHg indicate hypotension, which is defined as blood pressure that is lower than the normal expected range.

Low blood pressure, or hypotension, can manifest in various ways and may not always be a cause for concern. However, it can lead to symptoms such as dizziness, fainting, fatigue, and in severe cases, shock. The symptoms you experience can depend on how low your blood pressure is and how quickly it drops. For instance, a reading of 55/40 mmHg is particularly concerning and could indicate a medical emergency, especially if you are experiencing symptoms like dizziness or fainting.

There are several potential causes of low blood pressure, including dehydration, blood loss, certain medications, heart problems, and endocrine issues. In some cases, low blood pressure can be a result of a sudden change in position, such as standing up quickly, which can lead to orthostatic hypotension. This condition occurs when blood pressure drops significantly upon standing, leading to dizziness or lightheadedness.

Given your readings, it would be prudent to consult a healthcare professional for a thorough evaluation. They can assess your overall health, review any medications you may be taking, and determine if there are underlying conditions contributing to your low blood pressure. It’s also important to monitor for any symptoms you may be experiencing, as these can provide valuable information to your healthcare provider.

In terms of management, treatment for low blood pressure often focuses on addressing the underlying cause. For instance, if dehydration is a factor, increasing fluid intake may help. If medications are contributing to low blood pressure, your doctor may adjust your dosage or switch you to a different medication. In some cases, lifestyle changes such as increasing salt intake (under medical supervision), wearing compression stockings, or making gradual changes in position can also be beneficial.

In conclusion, while occasional low blood pressure readings may not be alarming, consistently low readings, especially those accompanied by symptoms, warrant further investigation. It’s essential to work closely with your healthcare provider to determine the best course of action tailored to your specific situation. Regular monitoring and open communication with your doctor can help ensure that your blood pressure remains within a safe range and that any potential issues are addressed promptly.

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