Acupuncture Point Weicang (BL50)
Location:
Lie pronely; at the level of the lower border of spinous process of the 12th thoracic vertebra, 3 cun apart from the posterior median line laterally.

Function:
Strengthening the spleen and stomach, regulating the flow qi, and removing obstruction from the channels and collaterals.

Regional Anatomy:
Skin-subcutaneous tissue-latissimus muscle of back-inferior posterior serratus muscle-erector spinal muscle-lumbar quarate muscle.
In the superficial layer, there are the lateral cutaneous branches of the posterior branches of the 12th thoracic and 1st lumbar nerves and the accompanying arteries and veins, In the deep layer, there are the muschlar branches of the posterior branches of the 12th thoracic and 1st lumbar nerve and the branches or tributaries of the dorsal branches of the related arteries and veins.

Indications:
Stomachache, gastritis, vomiting, abdominal distension, borborygmus, hydrops, and backache.

Prescription:
Combined use with NeiguanPC6 (Neiguan (PC6) Luo-Connecting Point the Eight Confluent Point) for treatment of ulcer; with ZusanliST36 (Zusanli (ST 36) He-Sea Point) for treatment of gastritis, and enteritis.

Methods:
Insert the needle obliquely, 0.5-0.8 cun deep; needling response: local numbness and distension; moxibustion: using 3-7 moxa-cones, or mild moxibustion for 15 min.
Note:
Don`t puncture deeply, or else the needle would penetrate the quadrate muscle of loins and the right kidney ( on right ) or the spleen or the left kidney ( on left ) by its tip, and cause an injury to kidney and spleen.