LOCATION
On the mid-auxillary line, in the 6th intercostal space.
Features
Major luo-connecting point of the spleen. Exit point.
Body Inches (cun)
Each person has his/her own personal body inches.
One cun is equal to the width of the Knuckle of the thumb.
Nerves, vascular
The sixth intercostal nerve and the long thoracic nerve end branch; the thoracic dorsal artery and vein, and the sixth intercostal artery and vein.
Indication
Sternocostal pain，asthma，body aches，weakness… Mentioned classically that when this point is deficient, all the joints are flaccid, and when excess, pain all over the body. Pain of the thoracic region. Descends lung qi – cough, chest oppression, shortness of breath.
Combinations
Sternocostal pain a.：SP 21 & BL 20 & LR 13.
Sternocostal pain b.：SP 21 & TE 08 & GB 38 & GB 41.
Sternocostal pain c.：SP 21 & TE 08 ~ PC 04 & GB 38 & GB 41.
穴位
側胸部，腋中線上，當第6肋間隙處。
特點
絡穴。
同身寸
針灸取穴比量法。出自《千金要方》。
是指以患者本人體表的某些部位折定分寸，
作为量取穴位的長度單位。
穴區神經血管
第六肋間神經及胸長神經末支；胸背動、靜脈及第六肋間動、靜脈。
適應症
胸肋滿痛，氣喘，全身疼痛，四肢無力等。
穴位配伍療法
胸肋痛 a：1.大包 2.脾俞 3.章門
胸肋痛 b：1.大包 2.三陽絡 3.陽輔 4.足臨泣
胸肋痛 c：1.大包 2.三陽絡透郄門 3.陽輔 4.足臨泣