LOCATION
In the region of sacrum, between the posterior-superior iliac spine and the posterior midline, in the first posterior sacral midline.
Features
One of the point of Baliao. Action on bladder.
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 posterior branch of the first sacral nerve and the posterior branch of the lateral sacral artery and vein.
Indication
Irregular menstruation，hysteroptosis，uterus meningitis，pelvic inflammatory disease，oophoritis；lumbago，lumbosacral painarthritis，knee arthritis；sciatica，paralysis of the lower limbs，pediatric paralysis sequelae；vulvar eczema，hemorrhoids， testitis，constipation，urinary retention. UB 31, UB 32, UB 33 & UB 34 together form the “Eight Liao” points and are all useful for local low back a/or sacrum problems and most genital and urinary related disorders. Of these UB 32 is most often used clinically. This point can be used to inGVce labor to expedite childbirth, abortion.
Combinations
Difficulty standing after kneel down：BL 31 & GB 30 & GB 34 & ST 39.
Fever no sweat：BL 31 & LU 06.
Difficulty in urination：BL 31 & SP 06 &CV 03.
To inGVce labor to expedite childbirth：BL 31 & LI 04 & SP 06.
穴位
在骶部，當髂後上棘與後正中線之間，適對第一骶後孔處。
特點
八髎穴之一。
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
第一骶神經後支和骶外側動、靜脈後支。
適應症
月經不調，子宮脫垂，子宮內膜炎，盆腔炎，卵巢炎；腰痛，腰骶關節炎，膝關節炎；坐骨神經痛，下肢癱瘓，小兒麻痺後遺症；外陰濕疹，痔瘡，睾丸炎，便秘，尿瀦留等。 本穴可用於催產，引產。
穴位配伍療法
腰腳不隨，不能跪起：1.上髎 2.環跳 3.陽陵泉 4.下巨虛
熱病汗不出：1.上髎 2.孔最
小便不利：1.上髎 2.三陰交3.中極穴
催產：1.上髎 2.合谷 3.三陰交