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Blood pressures are subjected to variations due to autonomic changes. External factors such as stress, anxiety
, position, etc. can bring about the autonomic changes and thereby blood pressure variations.
Normally blood pressure changes upto 20mmHg are acceptable limits.
That being said, associated symptoms such as headache, dizziness
Hence I encourage you to consult her neurologist
. She needs to be physically examined for neurological deficits.
Hope this helps.