B56 Chengjin ( V56 )

Location Midway between B55 and B57 , in the centre of the belly of m . gastrocnemius

Indications Spasm of the gastrocnemius , hemorrhoids , acute lower back pain .

Method Puncture perpendicularly - 0 . 8 - - 1 . 2 inches . Moxibustion is applicable

Vasculature The small saphenous vein ; deeper , the posterior tibial artery and vein .

Innervation The medial sural cutaneous nerve ; deeper , the tibial nerve .