BL56 (Chengjin, “Chengjin translates to 'Support the Sinew'”) is an acupuncture point on the Bladder Meridian. It is located on the posterior lower leg, in a depression at the center of the belly of the gastrocnemius muscle, approximately midway between Weizhong (BL40) and Chengshan (BL57). Classically described as being 7 cun superior to the heel. It relaxes the sinews and alleviates cramping, activates the channel and alleviates pain, treats hemorrhoids.
On the posterior lower leg, in a depression at the center of the belly of the gastrocnemius muscle, approximately midway between Weizhong (BL40) and Chengshan (BL57). Classically described as being 7 cun superior to the heel.
Perpendicular insertion 1.0 to 2.0 cun. Caution is advised to avoid deep insertion, which could injure the tibial nerve and posterior tibial artery and vein that lie deep to the gastrocnemius and soleus muscles.
Relaxes the sinews and alleviates cramping, activates the channel and alleviates pain, treats hemorrhoids..
Convulsions, leg soreness, numbness of the lower leg, cholera with muscle cramping, difficult defecation, heaviness of the leg, pain radiating to the lower abdomen, lumbar and back rigidity, hemorrhoid pain, epilepsy, madness, nasal congestion and nosebleed, axillary swelling, heel pain, leg pain..
Chengjin is a crucial local point for relaxing the powerful gastrocnemius muscle, making it highly effective for acute calf cramps, spasms, and pain. While classically needling was forbidden, its use for local muscle issues is now common. Its classical indications for hemorrhoids and difficult defecation highlight the Bladder channel's connection to the anus and its role in treating disorders of the lower jiao.
BL56 is one of 67 points on the Bladder Meridian. Nearby points:
BL56 (Chengjin) is located on the posterior lower leg, in a depression at the center of the belly of the gastrocnemius muscle, approximately midway between Weizhong (BL40) and Chengshan (BL57). Classically described as being 7 cun superior to the heel.
BL56 relaxes the sinews and alleviates cramping, activates the channel and alleviates pain, treats hemorrhoids. Common clinical indications include convulsions, leg soreness, numbness of the lower leg, cholera with muscle cramping, difficult defecation, heaviness of the leg, pain radiating to the lower abdomen, lumbar and back rigidity, hemorrhoid pain, epilepsy, madness, nasal congestion and nosebleed, axillary swelling, heel pain, leg pain.
Perpendicular insertion 1.0 to 2.0 cun. Caution is advised to avoid deep insertion, which could injure the tibial nerve and posterior tibial artery and vein that lie deep to the gastrocnemius and soleus muscles. Caution: The Jia Yi Jing, Qian Jin Yao Fang, and Zhen Jiu Ju Ying all state that this point is contraindicated for needling ('禁針' or '禁不可刺').
BL56 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).