Can episodes if low blood pressure feel like a head rush and dizzy? Normally have low pressure, at times get head rush/dizzy. Scans of head are normal

Yes. I can't scan of the brain will not help assess the cause of low blood pressure. Yes, the symptoms you're having Canby symptoms due to low blood pressure. You need to find the cause of your blow blood pressure, it is not coming from your brain. Could be hormonal issues, could be due to peripheral nerve disease such as neuropathy.