LOCATION
4 cun below the umbilicus, 0.5 cun lateral to Zhongji (CV4).
Features
Meeting point of Kidney Meridian and Chong Vessel.
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 subcostal nerve and the iliac hypogastric nerve, and the muscular branches of the arteries and veins under the abdominal wall.
Indication
Spermatorrhea，premature ejaculation，asynodia，orchitis；irregular menstruation，pelvic inflammatory disease. KI 11, KI 12, KI 13, KI 14 & KI 15 all intersect the Chong Mai and are useful as local points for abdominal a/or gynecological issues.
Great as a substitute for CV3.
Help ovulation (KI12, CV3, CV4).
Combinations
Irregular menstruation，penile pain：KI 12 & CV 04 & SP 06.
Spermatorrhea，involuntary emission，asynodia：KI 12 & GV 04 & LR 04.
Syncope accompanied with flaccidity：KI 12 & LR 04.
Spermatorrhea，retracted testicles：KI 12 & KI 02.
穴位
在下腹部，當臍中下4寸，前正中線旁開0.5寸。
特點
交會穴，通衝脈。
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
肋下神經及髂腹下神經的分支，和腹壁下動、靜脈的肌支。
適應症
遺精，早泄，陽痿，睪丸炎；月經不調，盆腔炎。
穴位配伍療法
月經不調，陰莖疼痛：1.大赫 2.關元 3.三陰交
遺精，滑精，陽痿：1.大赫 2.命門 3.中封
痿厥：1.大赫 2.中封
精溢陰上縮：1.大赫 2.然谷