Pain sensitive intracranial structure is
Pain-Sensitive Structures. Headache is caused by traction, displacement, inflammation, vascular spasm, or distention of the pain-sensitive structures in the head or neck. Isolated involvement of the bony skull, most of the dura, or most regions of brain parenchyma does not produce pain. Ref: guyton and hall textbook of medical physiology 12 edition page number: 687,688,689
Piamater
Pial vessels
Duramater
Brain matter
Nervous system