BL34 Xialiao (Lower Bone Hole)

Location

On the sacrum medial and inferior to the BL33 just at the 4th posterior sacral foramen.

Indications

Conditions for which BL34 is listed as indicated. An indication list is a reference index, not a prescription – see the protocols below for sourced treatments.

TCM actions

What classical sources say BL34 does in the terms of Chinese medicine theory. These describe the point, not a condition.

Protocols using BL34

• Dysmenorrhea Primary – ST28, BL20, BL31, BL32, BL33, BL34, LV03 (doi:10.1016/s0254-6272(09)60035-2 ↗)
• Leg Pain, Prolapse Of The Lumbar Intervertebral Disc, Low Back Pain – BL23, BL25, BL31, BL32, BL33, BL34, BL40, BL54 (doi:10.1016/s0254-6272(09)60003-0 ↗)
• Back Pain, Sciatica Pain, Herniated Nucleus Pulposus – BL23, BL24, BL25, BL26, BL31, BL32, BL33, BL34, BL40, BL57, BL60, GB30 (doi:10.1093/ecam/nep085 ↗)
• Constipation Functional, Stool Hard, Constipation Chronic, Defecation Difficulty – ST25, ST36, ST37, BL25, BL33, BL34, TB06, CV04, CV06 (doi:10.1155/2015/396396 ↗)
• Incontinence Urinary Stress, Incontinence Urinary Mixed, Incontinence Urinary Urgency – SP03, SP06, BL14, BL18, BL20, BL23, BL28, BL31, BL32, BL33, BL34, KD03, KD07, PC06, LV03, CV03, CV04, CV06, GV04, GV20 (doi:10.1136/acupmed-2015-010828 ↗)
• Urinary Retention Post-stroke, Bladder Dysfunction Incomplete Emptying – BL31, BL32, BL33, BL34 (doi:10.1186/s13063-016-1315-3 ↗)
• Spinal Cord Injury, Bladder Dysfunction Neurogenic, Urinary Retention Chronic – SP06, SP09, BL23, BL28, BL31, BL32, BL33, BL34, CV02, CV03, CV04, CV06 (doi:10.1155/2016/9245186 ↗)
• Constipation, Urinary Incontinence, Incontinence Post-surgical – BL32, BL33, BL34 (doi:10.1097/MD.0000000000015687 ↗)
• Nocturia, Urinary Frequency, Urinary Urgency, Overactive Bladder, Urgency Incontinence – SP06, BL33, BL34, KD03, CV04, CV06, GV20 (doi:10.1155/2020/1705964 ↗)
• Diarrhea, Abdominal Pain, Ulcerative Colitis, Blood In Stool – BL31, BL32, BL33, BL34 (doi:10.1186/s12906-020-03101-4 ↗)
• Frequency Urinary, Urgency Urinary, Discomfort Urinary Catheter-related, Suprapubic Pain, Agitation Postoperative – BL32, BL33, BL34, CV03, CV04, CV05, CV06, CV07 (doi:10.1155/2021/6691459 ↗)
• Insufficient Lactation, Urinary Retention Postpartum, Uterine Contraction Postpartum Pain, Depression Postpartum – BL31, BL32, BL33, BL34, KD01, CV08 (doi:10.1001/jamanetworkopen.2022.13261 ↗)
• Fatigue, Nausea, Diarrhea, Waist Pain, Dysmenorrhea Primary, Menstrual Pain, Lower-abdomen Pain – SP06, BL31, BL32, BL33, BL34, CV04 (doi:10.1155/2022/1281336 ↗)
• Anorectal Pain, Rectal Pain, Anorectal Bloating, Defecation Disorder – ST36, BL20, BL21, BL23, BL34, BL35, BL57, GB26, CV04, CV06, CV12, GV01, GV20 (doi:10.1097/MD.0000000000035462 ↗)
• Pelvic Pain, Anorectal Pain, Defecation Disorder, Pelvic Floor Dysfunction – BL18, BL23, BL25, BL33, BL34 (doi:10.5152/tjg.2024.22516 ↗)
• Depression Postpartum, Mood Disorder Postpartum, Anxiety Postpartum, Insomnia Postpartum, Postpartum Mood Changes – BL31, BL32, BL33, BL34, KD01, CV08 (doi:10.1159/000543477 ↗)
• Fecal Incontinence, Sleep Disturbance, Defecation Frequent, Evacuation Incomplete, Bowel Urgency – BL31, BL32, BL33, BL34, GV01 (doi:10.3389/fmed.2025.1517325 ↗)
• Fracture Coccyx, Coccyx Pain, Subluxation Coccyx, Difficulty Sitting – BL31, BL32, BL33, BL34 (doi:10.1097/MD.0000000000044068 ↗)
• Incontinence Urinary, Incontinence Stress, Prostatectomy Post-radical, Postoperative Radical Prostatectomy – BL32, BL33, BL34 (doi:10.1001/jamanetworkopen.2025.34491 ↗)
• Urinary Incontinence Stress, Pelvic Floor Dysfunction – ST36, SP06, BL23, BL24, BL31, BL32, BL33, BL34, BL35, CV03, CV04 (doi:10.11817/j.issn.1672-7347.2025.240242 ↗)
• Premature Ejaculation, Sexual Dysfunction – ST36, SP12, SP13, BL23, BL27, BL28, BL29, BL30, BL31, BL32, BL33, BL34, BL47, KD01, KD03, CV04, CV06 (doi:10.4103/0973-6131.113408 ↗)
• Childbirth Pain, Labor Pain – LI04, BL31, BL32, BL33, BL34, GB30, LV03 (doi:10.2147/JPR.S46693 ↗)
• Leg Pain, Leg Numbness, Leg Weakness, Radiculopathy Lumbar, Lower-back Pain – BL22, BL23, BL24, BL25, BL26, BL27, BL31, BL32, BL33, BL34, BL54, GB30, GV03, GV04 (doi:10.3831/KPI.2025.28.4.269 ↗)
• Dysuria, Urinary Frequency, Urinary Urgency, Benign Prostatic Hyperplasia, Lower Urinary Tract Symptoms – BL31, BL32, BL33, BL34 (doi:10.27465/d.cnki.gzzyc.2024.000579 ↗)
• Urinary Tract Infection, Urinary Retention, Neurogenic Bladder – ST36, SP06, BL31, BL32, BL33, BL34, BL57, KD01, CV03, CV04, CV06, CV08, GV20 (doi:10.16821/j.cnki.hsjx.2014.16.027 ↗)
• Depression Post-stroke, Urinary Retention Post-stroke – SP06, BL31, BL32, BL33, BL34, PC06, GV20 (doi:10.27026/d.cnki.ggszc.2023.000230 ↗)
• Urinary Incontinence Stress Postpartum – BL31, BL32, BL33, BL34, CV08 (doi:10.13359/j.cnki.gzxbtcm.2022.10.021 ↗)
• Urinary Incontinence Stress Postpartum – BL31, BL32, BL33, BL34 (doi:10.13359/j.cnki.gzxbtcm.2022.10.021 ↗)
• Urinary Retention Post-stroke – ST28, SP06, SP09, BL28, BL32, BL33, BL34, CV03, CV04 (doi:10.19917/j.cnki.1005-0779.023135 ↗)
• Spinal Cord Injury, Neurogenic Bladder, Urinary Dysfunction Retention – ST36, SP06, SP09, BL23, BL28, BL31, BL32, BL33, BL34, CV03, CV04, CV06 (doi:10.16294/j.cnki.1007-659x.2020.02.006 ↗)
• Fecal Incontinence, Bowel Dysfunction Postoperative, Bowel Urgency, Fecal Incontinence, Bowel Urgency, Bowel Dysfunction, Rectal Cancer – BL23, BL31, BL32, BL33, BL34, GV04 (doi:10.3389/fmed.2026.1815559 ↗)
• Urinary Retention, Spinal Cord Injury, Bladder Dysfunction Neurogenic, Spinal Cord Injury, Bladder Neurogenic – ST36, SP09, BL31, BL32, BL33, BL34, CV03, CV04 (doi:10.13703/j.0255-2930.20221027-k0005 ↗)
• Erectile Dysfunction – BL31, BL32, BL33, BL34 (doi:10.13703/j.0255-2930.20240924-0001 ↗)
• Incontinence Urinary Stress, Pelvic Floor Weakness – ST36, SP06, BL23, BL31, BL32, BL33, BL34, BL35, CV03, CV04, CV06 (doi:10.11817/j.issn.1672-7347.2025.240242 ↗)
• Constipation Functional, Straining Defecation, Defecation Incomplete, Defecation Difficulty – BL31, BL32, BL33, BL34 (doi:10.1097/md.0000000000046143 ↗)
• Bleeding Uterine, Intrauterine Residue Post-curettage – BL31, BL32, BL33, BL34 (doi:10.13703/j.0255-2930.20200716-k0003 ↗)
• Lactation Insufficiency, Urinary Retention – BL31, BL32, BL33, BL34, KD01, CV08 (doi:10.1001/jamanetworkopen.2022.13261 ↗)
• Anorectal Pain – ST36, BL20, BL21, BL23, BL34, BL35, BL57, GB26, CV04, CV06, CV12, GV01, GV20 (doi:10.1097/MD.0000000000035462 ↗)
• Anorectal Pain, Levator Ani Syndrome – BL18, BL23, BL25, BL33, BL34 (doi:10.5152/tjg.2024.22516 ↗)
• Defecation Frequent, Bowel Urgency, Rectal Cancer Lower Post-operative, Fecal Incontinence – BL31, BL32, BL33, BL34, GV01 (doi:10.3389/fmed.2025.1517325 ↗)
• Coccyx Pain, Fracture Coccyx, Coccyx Pain – BL31, BL32, BL33, BL34 (doi:10.1097/MD.0000000000044068 ↗)
• Urinary Incontinence, Urinary Incontinence Stress, Prostatectomy Post-radical – BL32, BL33, BL34 (doi:10.1001/jamanetworkopen.2025.34491 ↗)
• Urinary Incontinence, Incontinence Urinary Stress, Urinary Incontinence Stress – ST36, SP06, BL23, BL24, BL31, BL32, BL33, BL34, BL35, CV03, CV04 (doi:10.11817/j.issn.1672-7347.2025.240242 ↗)
• Chemotherapy Side Effects, Rectal Cancer – ST40, SP03, SP04, SP06, SP09, SP10, BL23, BL31, BL32, BL33, BL34, PC06, TB05, LV14, CV04, CV06, CV12, GV04, XH12, XH13 (doi:10.3389/fonc.2026.1957728 ↗)
• Bladder Discomfort Catheter-related – BL32, BL33, BL34, CV03, CV04, CV05, CV06, CV07 (doi:10.1155/2021/6691459 ↗)
• Postoperative Anal Pain, Hemorrhoids Mixed Postoperative – BL34, GV01 (doi:10.13703/j.0255-2930.2018.06.003 ↗)
• Postoperative Anal Pain, Hemorrhoids Mixed Postoperative – BL34, GV01, AT12, HX06, IAC03, TF10 (doi:10.13703/j.0255-2930.2018.06.003 ↗)
• Hemorrhoids Mixed Postoperative, Anal Pain – BL32, BL34 (doi:10.13703/j.0255-2930.2019.03.008 ↗)
• Postoperative Anal Pain, Hemorrhoids Mixed Postoperative – BL34, BL57 (doi:10.13703/j.0255-2930.2019.05.005 ↗)
• PCOS, Kidney-yang Deficiency – BL31, BL32, BL33, BL34 (王任阳陈培芳夏德鹏陈燕军张雪飞高楠. 针刺结合隔姜灸八髎穴治疗肾阳虚证多囊卵巢综合征疗效观察. 亚太传统医药 ., 2023 [CNKI])

Most often selected alongside BL34

How many sourced protocols in the index pair each point with BL34. Corpus frequency, not a combination to use.

• BL33Middle Bone Hole44 protocols
• BL32Second Bone Hole41 protocols
• BL31Upper Bone Hole34 protocols
• CV04Original Qi Gate18 protocols
• BL23Kidney Shu Point16 protocols
• CV06Sea Of Qi13 protocols
• SP06Three Yin Intersection12 protocols
• CV03Central Pivot11 protocols
• ST36Leg Three Miles10 protocols
• BL25Large Intestine Shu Point6 protocols
• GV01Long Strength6 protocols
• GV20100 Convergences6 protocols

Other points on the Bladder Meridian