Why are headaches associated with hypotension?

Headaches &hypotensi. Low BP can cause headaches, is due to changes in the BP of your head occur dramatically.If you bend over and suddenely move upright you may feel pain in your head.Once you get trggered with that you get like any other headache headaches are more common when BP is very high.
Two things. There is a rare cause of headaches related to low pressure in the spinal fluid. It can occur spontaneously or follow a spinal tap. The headache is better lying down and the BP idsnormal. The hypotension is just in the spianl fluid. It is possible that if the BP is low on standing, (orthostatic hypotension) the body produces more adrenaline which could cause a headache. (also worse on standing.).