Acupuncture Point Huangmen (BL51)
Location:
Lie pronely; at the level of the lower border of spinous process of the 1st lumbar vertebra, 3 cun apart from XuanshuGV5(Xuanshu (GV5)) laterally.

Function:
Regulating the stomach and qi, promoting blood circulation, and relaxing the bowels.

Regional Anatomy:
Skin-subcutaneous tissue-aponeurosis latissimus muscle of back- erector spinal muscle-lumbar quarate muscle.
In the superficial layer, there are the lateral cutaneous branches of the posterior branches of the 1st and 2nd lumbra nerves and the accompanying arteries and veins, In the deep layer, there are the muscular branches of the posterior branches of the 1st and 2nd lumbar nerves and the branches or tributaries of the dorsal branches of the 1st lumbar artery and vein.

Indications:
Gastrospasm, Constipation, Lumbago, and paralysis of the lower limbs.

Prescription:
Combined use with TianzongSI11 (Tianzong (SI 11)) for treatment of mastitis; and with FujieSP14 (Acupuncture Single Point Fujie (SP14)) for treatment of constipation.

Methods:
Insert the needle perpendicularly, 0.5-0.8 cun deep; needling response: local numbness and distension; moxibustion: using 3-5 moxa-cones, or mild moxibustion for 10 min.
Note:
Don`t puncture deeply, or else the needle would penetrate the quadrate muscle of loins and the kidney or sometimes the accessory spleen on left by its tip, and cause an injury to kidney and accessory spleen.