Blood Pressure Changes: Dizziness and Stroke Risks Explained

Usually, my blood pressure is low, but now it has returned to normal levels, and I feel a bit dizzy?

I usually have low blood pressure around 60-90, but now it's 85-110.
Recently, I've been feeling a bit dizzy, as if I've had a little beer; sometimes it feels better, and this has been going on for several days.
For someone who usually has low blood pressure, is this increase to normal levels considered high blood pressure in relative terms? Is there a risk of stroke? Which specialist should I consult? Thank you for your response.

hyl1688, 30~39 year old female. Ask Date: 2007/01/22

Dr. Huang Yingzhe reply Neurology

Dear hy11688,
This is Dr.
Huang Ying-Che from the Neurology Department of Tainan Hospital, Department of Health.
Based on your description, it is important to understand why your blood pressure is higher than before.
Are you currently experiencing any discomfort, such as dizziness, which could be contributing to the elevated blood pressure? However, given the current blood pressure readings, the risk of stroke is relatively low.
The focus should remain on identifying the reasons for the change in blood pressure compared to previous levels.

The Neurology Department at Tainan Hospital cares about your well-being and wishes you good health.

Reply Date: 2007/01/22

More Info

Understanding blood pressure changes, particularly in individuals with a history of low blood pressure, is crucial for assessing potential health risks, including dizziness and stroke. Your reported blood pressure readings of 85-110 mmHg indicate a shift from your usual lower range (60-90 mmHg) to a more typical range. However, whether this constitutes high blood pressure depends on various factors, including your overall health, symptoms, and any underlying conditions.

Firstly, it's important to clarify what constitutes normal blood pressure. The American Heart Association defines normal blood pressure as less than 120/80 mmHg. Your current readings, while higher than your baseline, are still within the normal range, albeit on the lower end. However, if you have been accustomed to lower blood pressure, this increase might feel significant to you, leading to symptoms such as dizziness.

Dizziness can occur for several reasons, especially when blood pressure fluctuates. In your case, transitioning from low to normal blood pressure might cause your body to react as it adjusts to these changes. This adjustment period can lead to feelings of lightheadedness or dizziness, similar to the effects of consuming alcohol, as you described. It's essential to monitor how you feel during this transition and consult a healthcare professional if symptoms persist.

Regarding the risk of stroke, while elevated blood pressure is a well-known risk factor for stroke, your current readings do not indicate hypertension. However, if your blood pressure were to rise significantly above normal levels, it could increase your risk. The relationship between blood pressure and stroke risk is complex; both high and low blood pressure can pose risks. Low blood pressure can lead to inadequate blood flow to the brain, potentially resulting in dizziness or fainting, while high blood pressure can damage blood vessels over time, increasing the likelihood of a stroke.

Given your symptoms and history, it would be advisable to consult a healthcare provider, preferably a cardiologist or a primary care physician. They can conduct a thorough evaluation, including a physical examination and possibly additional tests, to determine the cause of your dizziness and assess your cardiovascular health. They may also recommend lifestyle modifications, such as dietary changes, increased hydration, or adjustments in physical activity, to help manage your blood pressure effectively.

In summary, while your current blood pressure readings are not classified as high, the symptoms you are experiencing warrant further investigation. Monitoring your blood pressure regularly and discussing any changes with your healthcare provider will help ensure that you maintain optimal health and minimize any potential risks, including stroke.

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