LOCATION
2.5cun directly above the midpoint of the posterior hairline, 1.5 cun directly above Fengfu (GV16), in the depression on the upper border of the external occipital protuberance.
Features
Meeting point with the BL Meridian.
Body Inches (cun)
Each person has his/her own personal body inches.
One cun is equal to the width of the Knuckle of the thumb.
Nerves, vascular
The branches of the greater occipital nerve and the left and right occipital artery and vein branches.
Indication
Headache dizziness，yellowish sclera，vertigo，dizziness，fainting，goiter，neuritis optica； neck/Cervical issues，pain a/or stiffness of the neck，heaviness of the head，headache， dizziness. Epilepsy, mania, lockjaw, loss of voice. Eye pain, excessive lacrimation.
Combinations
Headache：GV 17 & BL 07 & GB 19.
Yellowish sclera，hypochondrium pain，loss of appetite：GV 17 & BL 19 & BL 49 & BL 48.
Goiter：GV 17 & BL 07 & TE 12 & CV 22.
穴位
在頭部，後髮際正中直上2.5寸，風府上1.5寸，枕外隆凸的上緣凹陷處。
特點
交會穴，通足太陽。
同身寸
針灸取穴比量法。出自《千金要方》。
是指以患者本人體表的某些部位折定分寸，
作为量取穴位的長度單位。
穴區神經血管
枕大神經分支和左右枕動靜脈分支。
適應症
頭痛頭重，面赤目黃，眩暈，癭瘤，視神經炎。
穴位配伍療法
頭重痛：1.腦戶 2.通天 3.腦空
目黃、脅痛，食欲不振：1.腦戶 2.膽俞 3.意舍 4.陽綱
癭瘤：1.腦戶 2.通天 3.消濼 4.天突