Bladder July 9, 2020 0 comments BL 66 – TONGGU Bladder Meridian Acupuncture Point BL 66 – Chinese name: TONGGU Location Anterior to the 5th metatarsophalangeal joint. Indications Painful changes in the back of the head and neck. Pain locatedĀ in the lateral regions of the foot and fingers. Tarsalgia.