Ask the expert

Headaches when I wake or after I shower - is low BP to blame?

The last few days I've been having headaches when I sleep or after I shower. I checked my blood pressure and it was 104 over 75. On the basis that my headaches would appear to be caused by low blood pressure is there anything I can do about it?

27 August 2019

We are sorry to hear you've been suffering with headaches and that you feel this may be related to having low blood pressure, also known as hypotension.

Hypotension is normally defined as a blood pressure reading below 90/60mmHg. Whilst your reading might be lower than your usual, it might not fit directly into the hypotension category.

The symptoms of hypotension can be experienced as becoming unsteady on your feet, feeling dizzy and in some cases fainting, having blurred vision, feeling nauseous, and becoming confused and generally weak.

Showering might help lower your blood pressure and, generally, when sleeping in a flat position your blood pressure tends to lower. Headaches are not commonly associated with low blood pressure, although high blood pressure can cause them. As such it is unlikely that these things would be the cause of your headache, at least from a hypotension point of view.

For this reason we would strongly urge you to seek medical advice from your GP to discuss the situation in more detail and ascertain what the cause of your headaches might be. At the same time they can investigate the changes in your blood pressure and, if needed be, start treatment.

Answered by the Health at Hand team.

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