Acupuncture Point Ganshu (BL18)
Location:
Lie prostrate or pronely; at the level of the lower border of spinous process of the 9th thoracic vertebra, 1.5 cun apart from JinsuoGV8(Jinsuo (GV8)) laterally.

Function:
Relieving the depressed liver and normalizing the functioning of the gallbladder, and tranquilizing the mind.

Regional Anatomy:
Skin-subcutaneous tissue-trapezius muscle-latissimus muscle of the back-inferior posterior serratus muscle-erector spinal muscle.
In the superficial layer, there are the cutaneous branches of the posterior branches of the 9th and 10th thoracic nerves and accompanying arteries and veins. In the deep layer, there are the muscular branches of the posterior branches of the 9th and 10th thoracic nerves and the branches or tributaries of the related posterior intercosral arteries and veins.

Indications:
Acute and chronic hepatitis, Cholecystitis, retinal hemorrhage, optic atrophy, night blindness, Chronic Gastritis, gastric dilatation, gastrospasm, gastric hemorrhage, intestinal hemorrhage, bronchitis, intercostal neuralgia, Neurasthenia, Irregular Menstruation, icterus, and psychosis.

Prescription:
Combined use with JingmingBL1 (Jingming (BL 1)) for treatment of night blindness; with QiuhouEXHN7 (EX-HN7) for treatment of optic neuritis; with RiyueGB24 (Riyue (GB 24)) Front-Mu Point of the Gallbladder), YanglingquanGB34 (Acupuncture Single Point Yanglingquan (GB34) He-Sea Point, Influential Point of Tendon) for treatment of cholelithiasis; with XiaochangshuBL27 (Xiaochangshu (BL27)), LigouLR5 (Ligou (LR 5) Luo-Connecting Point), ZhaohaiKI6 (Zhaohai (KI 6) The Eihgt Confluent Point), XialianLI8 (Xialian (LI8)), QiuxuGB40 (Qiuxu (GB40) Yuan-Primary Point), ZhongduLR6 (Zhongdu (LR6) Xi-Cleft Point)for treatment of pain in the lower abdomen; and with ZhiyangGV9 (Acupuncture Single Point Zhiyang (GV9)), ZusanliST36 (Zusanli (ST 36) He-Sea Point) for treatment of infective hepatitis.

Methods:
Insert the needle horizontally 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 transversospinal muscle-the external intercostal muscle-the internal intercostal muscle-the parietal pleura-the pleural cavity-the visceral pleura and the lung by its tip, and cause an injury to lung tissue, leading to pneumatothorax.