[header] How to cope with a spinal headache [title] Consume caffeine to constrict the blood vessels in your head. [step] Caffeine is a central nervous system stimulant and causes constriction of the blood vessels within your head. [substeps] Since headache is often caused by the dilatation of blood vessels, caffeine helps constrict them and counteract this effect. 
Caffeine can be taken both orally and intravenously. A recommended dose of caffeine is 500 mg once or twice daily.