Transverse-obliquely to a maximal depth of 0.8 cun.
Caution: Risk of pneumothorax if needling in a medial direction.
The functions of LU-2 is fairly similar to Zhongfu LU-1, but less strong. It can clear Excess of all kinds from the Lungs, whether due to Exterior pathogenic factors (e.g. Wind-Cold or Wind-Heat) which penetrate in the Lungs, or to internally generated disharmonies such as Phlegm-Heat, Qi Stagnation and etc.
On top of that, it can also be used to treat Painful Obstruction Syndrome of the shoulder, especially these caused by Wind invasion. In this case, the patients fail to adduct their arm. For example, they are not able to move their arm over close to the body towards the opposite side.