With the highest number of incidences reported from Japan, Moya Moya syndrome narrows main arteries in the brain, thereby blocking the blood flow and causing severe blood clots. Headache is the primary and initial symptom of this rare disease. - See more at: http://www.ummid.com/news/2013/July/19.07.2013/unusual_headches.html#sthash.ldWP91rz.dpuf
With the highest number of incidences reported from Japan, Moya Moya syndrome narrows main arteries in the brain, thereby blocking the blood flow and causing severe blood clots. Headache is the primary and initial symptom of this rare disease.