Vertically 1–1.5 cun
Quchi LI-11 is one of the most widely used point and it is indicated for many conditions.
First of all, it clears Interior Heat. For acute cases, Exterior Heat (eg: Wind-Heat) invades, penetrates the Defensive Qi (1st stage) and accumulates at the Qi Level (2nd stage) according to the Four Level Theory. Thus it develops to Interior Heat. It is also effective in clearing chronic Heat of any Organs, especially in Liver Fire Blazing.
Furthermore, it has a long history of being used for skin problems as it clears Heat in the Blood. This is one of the fundamental causes for many skin diseases such as urticaria, psoriasis and eczema. Another Sea-He point of the Yang Channel, Weizhong BL-40 is also a major point indicated for skin issues.
Skin diseases can also be caused by Dampness, especially Damp-Heat, such as papular or vesicular skin eruptions or acne. Apart from skin, Quchi LI-11 also resolves Dampness in other Organs. For example, it treats diarrhoea or digestive problem due to Dampness in the Spleen and Intestines.
Finally, it treats Painful Obstruction Syndrome, Atrophy Syndrome and Wind-Stroke paralysis by removing obstructions from the Channel. It is most effective in arms, shoulders and elbows and is able to treat pain, stiffness and numbness there.