Transversely 0.5–1 cun.
Yuzhen BL-9 is a major point of the Bladder Channel with various functions.
It pacifies Interior Wind as well, especially if it happens due to Liver Yang Rising. Typical symptoms are occipital headache, dizziness, neck pain with inability to turn the head, feeling of head heaviness , red face or even epilepsy and loss of consciousness.
The Liver opens to the eyes, thus BL-19 can also brightens the eyes by subduing Liver Yang.
Finally, it treats manic behavior by opening the Mind's orifices.