# BL33 Zhonghe (Middle Bone Hole) – Bladder Meridian

中髎 · zhōng hé

Location: On the sacrum medial and inferior to the BL32 just at the 3rd posterior sacral foramen.

Cautions: Caution in sacroiliac dysfunction.

Canonical page: https://acuiq.com/points/bl33

## Indications

An indication list is a reference index, not a prescription – see the protocols below for sourced treatments.

Muscle Wasting, Benefit Back Lumbar, Benefit Back Lumbar, Benefit Defecation, Benefit Defecation, Benefit Legs, Benefit Legs, Benefit Regulate Jiao Lower, Benefit Urination, Benefit Urination, Cold Coccyx, Cold Coccyx, Cold Sacrum, Cold Sacrum, Constipation, Diarrhoea Undigested, Diarrhoea Undigested, Abdominal Bloating, Abdominal Bloating, Defecation Problems, Defecation Problems, Urinary Problems, Urinary Problems, Infertility, Vaginal Discharge, Vaginal Discharge, Pain, Lower Back Pain, Lower Back Pain, Irregular Periods, Period / Menstruation Irregular, Period / Menstruation Scanty, Period Scanty, Regulate Jiao Lower, Urinary Retention, Urinary Retention, Cold Buttock Sensation, Cold Buttock Sensation, Bi Arthralgia Leg Syndrome, Bi / Arthralgia Leg Syndrome, Painful Urination, Painful Urination

## Most often selected alongside BL33

Sourced protocols in the index pairing each point with this one. Corpus frequency, not a combination to use.

- BL32 (Second Bone Hole) – 66 protocols
- BL34 (Lower Bone Hole) – 43 protocols
- SP06 (Three Yin Intersection) – 40 protocols
- BL23 (Kidney Shu Point) – 35 protocols
- BL31 (Upper Bone Hole) – 35 protocols
- BL35 (Meeting Of Yang) – 33 protocols
- CV04 (Original Qi Gate) – 31 protocols
- CV03 (Central Pivot) – 17 protocols

## Protocols using BL33 (50 best-sourced of 106)

| Symptoms | Points | Course | Source | Kind | Caveat |
|---|---|---|---|---|---|
| Low Back Pain, Pelvic Girdle Pain, Sacroiliac Pain, Symphysis Pain, Pregnancy Second Trimester, Pregnancy Third Trimester | LI04, ST36, SP12, BL26, BL32, BL33, BL54, BL60, KD11, GB30, GV20 | 42 days | doi:10.1186/1472-6882-8-34 | trial | Point selection reported in a published study. |
| Bladder Dysfunction Neurogenic, Incontinence Urinary | BL33 | 28 days | doi:10.1093/ecam/nep010 | trial | Point selection reported in a published study. |
| Back Pain, Sciatica Pain, Herniated Nucleus Pulposus | BL23, BL24, BL25, BL26, BL31, BL32, BL33, BL34, BL40, BL57, BL60, GB30 | 15 days | doi:10.1093/ecam/nep085 | trial | Point selection reported in a published study. |
| Absent Periods, Infertility, Night Sweats, Hot Flashes, Vaginal Dryness, Mood Swings | ST25, ST29, BL33, CV04 | 44 days | doi:10.1155/2013/657234 | trial | Point selection reported in a published study. |
| Nocturia, Urinary Frequency, Urinary Urgency, Urinary Hesitancy, Benign Prostatic Hyperplasia, Urinary Straining, Urinary Dribbling, Lower Urinary Tract Symptoms | BL33 | 16 days | doi:10.1371/journal.pone.0059449 | trial | Point selection reported in a published study. |
| Incontinence Urinary Stress | BL33, BL35 | 42 days | doi:10.1186/1745-6215-14-315 | trial | Point selection reported in a published study. |
| Constipation, Urinary Incontinence, Urinary Retention, Bladder Dysfunction Neurogenic, Bowel Dysfunction Neurogenic, Spinal Cord Injury Traumatic | BL32, BL33, BL35 | 56 days | doi:10.1155/2013/543174 | trial | Point selection reported in a published study. |
| Constipation Chronic Severe, Constipation Straining, Constipation Incomplete-evacuation | ST25, ST37, SP14, BL33, GV20, GV24 | 56 days | doi:10.1186/1472-6882-14-260 | trial | Point selection reported in a published study. |
| Nocturia, Urinary Frequency, Urinary Urgency, Urinary Incontinence Mixed, Urinary Incontinence Stress, Urinary Incontinence Urgency | BL33, BL35 | 84 days | doi:10.1186/1472-6882-14-301 | trial | Point selection reported in a published study. |
| Urinary Incontinence Stress, Urinary Incontinence Exertional | BL33, BL35 | 56 days | doi:10.1186/s13063-015-0560-1 | trial | Point selection reported in a published study. |
| Constipation Functional, Stool Hard, Constipation Chronic, Defecation Difficulty | ST25, ST36, ST37, BL25, BL33, BL34, TB06, CV04, CV06 | 28 days | doi:10.1155/2015/396396 | trial | Point selection reported in a published study. |
| 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 | 84 days | doi:10.1136/acupmed-2015-010828 | trial | Point selection reported in a published study. |
| Incontinence Urinary Stress, Urine Leakage Exertion, Urine Leakage Coughing, Urine Leakage Sneezing | BL33, BL35 | 42 days | doi:10.1371/journal.pone.0150821 | trial | Point selection reported in a published study. |
| Urinary Retention Post-stroke, Bladder Dysfunction Incomplete Emptying | BL31, BL32, BL33, BL34 | 14 days | doi:10.1186/s13063-016-1315-3 | trial | Point selection reported in a published study. |
| Spinal Cord Injury, Bladder Dysfunction Neurogenic, Urinary Retention Chronic | SP06, SP09, BL23, BL28, BL31, BL32, BL33, BL34, CV02, CV03, CV04, CV06 | 14 days | doi:10.1155/2016/9245186 | trial | Point selection reported in a published study. |
| Sexual Dysfunction, Pelvic Pain, Chronic Prostatitis, Prostate Pain, Urinary Tract Symptoms Lower | SP06, BL23, BL33, BL35 | 56 days | doi:10.1186/s12906-016-1428-y | trial | Point selection reported in a published study. |
| Pelvic Pain, Prostatitis Chronic, Urogenital Pain, Urinary Symptoms Lower Urinary Tract | SP06, BL23, BL33, BL35 | 28 days | doi:10.1097/MD.0000000000012887 | trial | Point selection reported in a published study. |
| Constipation, Urinary Incontinence, Incontinence Post-surgical | BL32, BL33, BL34 | 4 days | doi:10.1097/MD.0000000000015687 | trial | Point selection reported in a published study. |
| Infertility Female, Hypomenorrhea, Menstrual Irregularity, Fallopian Tube Obstruction Bilateral, Diminished Ovarian Reserve | ST25, BL32, BL33, CV04 | 90 days | doi:10.1097/MD.0000000000017160 | trial | Point selection reported in a published study. |
| Dysuria, Nocturia, Urinary Frequency, Urinary Urgency, Benign Prostatic Hyperplasia, Urinary Obstruction | BL32, BL33 | 28 days | doi:10.1155/2019/1439141 | trial | Point selection reported in a published study. |
| Incontinence Urinary Stress, Incontinence Urinary Mixed Stress-predominant | BL33, BL35 | 42 days | doi:10.1136/bmjspcare-2019-002034 | trial | Point selection reported in a published study. |
| Nocturia, Urinary Frequency, Urinary Urgency, Incontinence Urinary Mixed, Incontinence Urgency, Incontinence Stress | SP06, BL33, BL35 | 84 days | doi:10.1186/s12906-019-2784-1 | trial | Point selection reported in a published study. |
| Nocturia, Urinary Frequency, Urinary Urgency, Overactive Bladder, Urgency Incontinence | SP06, BL33, BL34, KD03, CV04, CV06, GV20 | 21 days | doi:10.1155/2020/1705964 | trial | Point selection reported in a published study. |
| Nocturia, Urinary Urgency, Urinary Incontinence Urgency, Urinary Frequency Daytime | SP06, BL23, BL33, BL35 | 84 days | doi:10.1186/s12906-020-03018-y | trial | Point selection reported in a published study. |
| Diarrhea, Abdominal Pain, Ulcerative Colitis, Blood In Stool | BL31, BL32, BL33, BL34 | 30 days | doi:10.1186/s12906-020-03101-4 | trial | Point selection reported in a published study. |
| Frequency Urinary, Urgency Urinary, Discomfort Urinary Catheter-related, Suprapubic Pain, Agitation Postoperative | BL32, BL33, BL34, CV03, CV04, CV05, CV06, CV07 | 2 days | doi:10.1155/2021/6691459 | trial | Point selection reported in a published study. |
| Insufficient Lactation, Urinary Retention Postpartum, Uterine Contraction Postpartum Pain, Depression Postpartum | BL31, BL32, BL33, BL34, KD01, CV08 | 3 days | doi:10.1001/jamanetworkopen.2022.13261 | trial | Point selection reported in a published study. |
| Fatigue, Nausea, Diarrhea, Waist Pain, Dysmenorrhea Primary, Menstrual Pain, Lower-abdomen Pain | SP06, BL31, BL32, BL33, BL34, CV04 | 30 days | doi:10.1155/2022/1281336 | trial | Point selection reported in a published study. |
| Nocturia, Urination Frequent, Benign Prostatic Hyperplasia, Urination Urgency, Urination Incomplete Emptying, Urinary Intermittent Stream | SP06, SP09, BL33, BL35, CV04 | 42 days | doi:10.1097/MD.0000000000030429 | trial | Point selection reported in a published study. |
| Urinary Retention Postoperative, Postoperative Anal Pain, Anal Bloating, Hemorrhoids Mixed Postoperative | BL32, BL33 | 3 days | doi:10.1007/s00384-023-04403-y | trial | Point selection reported in a published study. |
| Anxiety, Sweating, Palpitations, Hot Flashes, Cancer Prostate Androgen Deprivation Therapy Side Effects | SP06, SP09, BL15, BL23, BL33 | 42 days | doi:10.1186/s12906-023-04218-y | trial | Point selection reported in a published study. |
| Fatigue, Constipation, Abdominal Distension, Voiding Dysfunction, Urinary Retention Acute, Herpes Zoster Sacral | SP06, BL32, BL33, CV02, CV03 | 63 days | doi:10.1097/MD.0000000000036007 | trial | Point selection reported in a published study. |
| Chronic Pain, Low Back Pain, Disability Low Back | SP06, BL23, BL31, BL32, BL33, BL60 | 28 days | doi:10.1016/j.jams.2018.02.002 | trial | Point selection reported in a published study. |
| Pelvic Pain, Anorectal Pain, Defecation Disorder, Pelvic Floor Dysfunction | BL18, BL23, BL25, BL33, BL34 | 28 days | doi:10.5152/tjg.2024.22516 | trial | Point selection reported in a published study. |
| Depression Postpartum, Mood Disorder Postpartum, Anxiety Postpartum, Insomnia Postpartum, Postpartum Mood Changes | BL31, BL32, BL33, BL34, KD01, CV08 | 2 days | doi:10.1159/000543477 | trial | Point selection reported in a published study. |
| Pelvic Chronic Pain, Lumbosacral Pain, Lower-abdomen Pain, Pelvic-inflammatory-disease | LI04, SP06, SP09, BL33, BL35, LV03 | 42 days | doi:10.3390/medicina61020354 | trial | Point selection reported in a published study. |
| Fecal Incontinence, Sleep Disturbance, Defecation Frequent, Evacuation Incomplete, Bowel Urgency | BL31, BL32, BL33, BL34, GV01 | 180 days | doi:10.3389/fmed.2025.1517325 | trial | Point selection reported in a published study. |
| Fracture Coccyx, Sacrococcygeal Pain, Subluxation Coccyx, Difficulty Sitting | BL31, BL32, BL33, BL34 | 14 days | doi:10.1097/MD.0000000000044068 | trial | Point selection reported in a published study. |
| Incontinence Urinary, Incontinence Stress, Prostatectomy Post-radical, Postoperative Radical Prostatectomy | BL32, BL33, BL34 | 42 days | doi:10.1001/jamanetworkopen.2025.34491 | trial | Point selection reported in a published study. |
| Fatigue, Anxiety, Depression, Lumbar Pain, Abdomen Lower Pain, Pelvic Chronic Pain, Bowel Dysfunction Constipation | ST25, SP06, BL23, BL32, BL33, BL35, CV03, CV04, CV12 | 120 days | doi:10.2147/IJWH.S541559 | trial | Point selection reported in a published study. |
| Urinary Incontinence Stress, Pelvic Floor Dysfunction | ST36, SP06, BL23, BL24, BL31, BL32, BL33, BL34, BL35, CV03, CV04 | 28 days | doi:10.11817/j.issn.1672-7347.2025.240242 | trial | Point selection reported in a published study. |
| Infertility, Poor Ovarian Response, Diminished Ovarian Reserve | ST25, ST36, SP06, BL23, BL33, KD03, KD12, GB13, LV03, CV04, CV12, GV20, GV24 | 36 days | doi:10.3389/fendo.2026.1765527 | trial | Point selection reported in a published study. |
| Urinary Retention, Spinal Cord Injury, Urinary Retention Spinal Cord Injury | BL32, BL33 | 28 days | doi:10.13702/j.1000-0607.20250263 | trial | Point selection reported in a published study. |
| Urinary Dysfunction, Pelvic Pain, Prostatitis Chronic | BL33 | 28 days | doi:10.1186/1749-8546-2-1 | trial | Point selection reported in a published study. |
| Premature Ejaculation, Sexual Dysfunction | ST36, SP12, SP13, BL23, BL27, BL28, BL29, BL30, BL31, BL32, BL33, BL34, BL47, KD01, KD03, CV04, CV06 | 21 days | doi:10.4103/0973-6131.113408 | trial | Point selection reported in a published study. |
| Childbirth Pain, Labor Pain | LI04, BL31, BL32, BL33, BL34, GB30, LV03 | 1 days | doi:10.2147/JPR.S46693 | trial | Point selection reported in a published study. |
| 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 | trial | Point selection reported in a published study. |
| Anorectal Pain, Levator Ani Syndrome | LI04, ST36, SP06, HT07, BL33, KD01, LV03, CV04, GV01 | 56 days | doi:10.22246/jikm.2024.45.1.111 | trial | Point selection reported in a published study. |
| Urinary Retention, Neurogenic Bladder, Bladder Dysfunction | BL32, BL33, BL35 | – | doi:10.13703/j.0255-2930.20231216-k0001 | trial | Point selection reported in a published study. |
| Dysuria, Urinary Frequency, Urinary Urgency, Benign Prostatic Hyperplasia, Lower Urinary Tract Symptoms | BL31, BL32, BL33, BL34 | 28 days | doi:10.27465/d.cnki.gzzyc.2024.000579 | trial | Point selection reported in a published study. |

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AcuiQ-authored prose (symptom and meridian descriptions, the wiki, the auricular crosswalk) is licensed CC-BY-4.0: https://creativecommons.org/licenses/by/4.0/. The assembled protocol compilation is not: build on it with attribution, but do not redistribute it whole as a dataset – https://acuiq.com/terms. The underlying findings are the cited sources' claims – each entry carries its citation; verify against the source before relying on it. Not medical advice: https://acuiq.com/terms