Cheng, bear; tendons, refers to the gastrocnemius muscle. The point is located in the belly of the gastrocnemius muscle, hence the name.

bubble_chart Location

Chengjin (BL56) acupoint
(adapted from "Meridians and Acupoints")

• Zhenjiu Jiayi Jing: "In those who are trapped in the middle of the intestines";
• Suwen ‧Study on LumbagoWang Bing's note: "In The five cun of the body cun below the popliteal joint are connected to the acupoint 鄄中 and the lower part is the position of Shenmai (BL62). This is the Chengjin (BL56) point, which is the acupoint of the popliteus. The center is like the center of the outside."
• Qianjin Yaofang‧: "Behind the shin, seven cun from the heel";
• Xunjing Kaoxue Bian: "Living in Chengshan (BL57) One cun up”.

bubble_chart Anatomy

• Muscle: between the two muscle bellies of the gastrocnemius.
• Nerve: medial sural cutaneous nerve, deep layer is tibial nerve.
• Vessel: small saphenous vein, deep layer is posterior tibial artery and vein.

bubble_chart Manipulation

Perpendicular insertion 1～1.5 cun. Moxibustion with moxa cone 3 to 5 times, moxibustion with moxa stick for 5 to 10 minutes.

bubble_chart Efficacy

Benefit the waist and legs, regulate large intestine, and lift the anus.

• Classical: Hanre, scabies, calf soreness, tarsal pain, foot spasm, heel pain, constipation, prolapse of rectum, hemorrhoids, low back pain, muscle cramp, headache Dizziness, abdominal pain, peripheral abscess, bloody defecation, and epistaxis.
• Modern: gastrocnemius spasm, sciatica.

bubble_chart Combinations

• Difficulty in defecation and defecation: Chengjin (BL56), Dadu (SP2), Dadun (LR1).