Vertically 0.7–1 cun. Or 1.5-2 cun through the foramen.
Caution:Reducing Needling techniques are contraindicated during pregnancy, except for promoting labor.
'Liao' means crevice, thus BL-31, BL-32, BL-33 and BL-34 are called 'Siliao'(Four crevices) or 'Baliao'(Eight crevice since there are four crevices on each side). They are called so, due to their location in the four sacral foramina.
Shangliao BL-31 (Upper crevice) is at the highest sacral foramina. Ciliao BL-32 (Second crevice) is at the second. Zhongliao BL-33 (Middle crevice) the third, while Xialiao BL-34 (Lower crevice) is the last one.
All these four points share similar actions, but Ciliao BL-32 is the most important one with the widest indication.
First of all, it regulates the Lower Burner and treats urination and defecation Difficulties. Kidney Deficiency is an important underlying pattern for this disorder, which is frequently seen in elderly and weak patients. Typical urinary manifestations include painful and difficult urination, dark and retention of urine as well as enuresis. While intestines related symptoms covers difficult defecation, constipation, borborygmi and diarrhoea.
Furthermore, by removing Dampness from the Lower Burner, it is effective in treating gynecological disorders such as dysmenorrhoea, infertility, irregular menstruation, labor pain and leucorrhoea. BL-32 is especially useful for infertility and painful periods. It can also reduce back pain during labor.
BL-32 is indicated for genital disorders as well, but Xialiao BL-34 has the strongest effect. Typical manifestations are swelling and painful vagina, incessant green vaginal discharge, pain of the testicles and etc.
All these four points benefit the lumbar region, lower back and legs. They remove the Painful Obstructions from the Channel by invigorating the Qi and Blood. Ciliao BL-32 and Zhongliao BL-33 have the most effect on this action.