SAH and headaches

[DieselBolus17]

What is the exact mechanism on why subarachnoid hemorrhages or strokes in general cause headaches? From what I've read there are no pain receptor on the brains surface, does the pressure buildup from hemorrhagic strokes compress arteries within the brain and activate their pain receptors?


Thanks...

 

[Carlos Danger]

The meninges are innervated.

 

[zzyzx]

Yup, as Remi said, the meninges are innervated, and the blood irritates them.
Likewise, a patient will get a headache and neck paid due to irritation of the meninges when they have meningitis.