“Cheng” means to hold or to support. “Shan” means hill. The point is situated at the highest place at the muscles on the posterior aspect of the leg, likened here to a small hill. This small hill is an important factor in the maintenance of an upright stance, hence the name Chengshan (Supporting Hill).
In the upper end of the depression formed by the lambdoidal suture on the belly of the calf, the depression becomes clearer if the heel is raised with the toes still touching the ground. Alternatively, with the patient lying in a prone position, the point is located midway along the line connecting Weizhong (BL40) and the midpoint of the transverse line connecting the tips of the external and medial malleoli.
- Spasm of the gastrocnemius (combine with Tiaokou (ST38)).
- Pain in the lower back and the lower limbs (combine with Shenshu (BL23), Weizhong (BL40) and Yanglingquan (GB34)).
- Pain in the heel (combine with Kunlun (BL60)).
- Paralysis of the lower extremities.
- Anal fissure.
- Prolapse of the rectum.
- Activate the meridians and collaterals.
- Relax the tendons.
- Regulate the functional activities of the zangfu organs.