• Transverse Luo: from LI-6 to LU-9, Source (Yuan) point of the Lung.
• Longitudinal Luo: from LI-6 goes to LI-15, heads to the supraclavicular fossa at ST-12, ascends along the neck, rises to the cheek and bifurcates. One branch penetrates the gums and teeth. The other branch goes to the ear.

Symptoms

• Excess: dental caries, toothache and deafness.
• Deficiency: sensation of cold in the teeth.