On the chest, in the 2nd intercostal space, 4 cun lateral to the anterior median line.
Fullness and pain in the chest and the costal region, cough, asthma, mastitis.
Descends rebellious Qi, frees the chest, benefits the breasts.
Oblique or subcutaneous insertion .5 - .8 cun. Under the points from ST 11 to ST 18, there are important organs and a main artery. Do not puncture these points deeply.