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    All Back-Shu points
    Back-Shu of the Large Intestine · Metal · Bladder inner line

    BL-25Dà Cháng Shū 大腸俞

    Back-Shu of the Large Intestine 大腸. Front-Mù pair: ST-25 Tiān Shū.

    Spinal level
    L4
    1.5 cùn lateral to the spine
    Element
    Metal
    Front-Mù pair
    ST-25 Tiān Shū

    Location

    1.5 cùn lateral to the lower border of the spinous process of L4, at the level of the iliac crest.

    Actions

    • Regulates the Large Intestine
    • Relieves constipation and diarrhoea
    • Strengthens the lumbar region and relieves sciatica

    Indications

    Constipation, diarrhoea, low back pain, sciatica, IBS.

    Local point for lumbar patterns as well as systemic LI treatment.

    Needling technique

    Perpendicular 1.0–1.5 cùn. Deeper insertion (up to 2 cùn) is used clinically for sciatica.

    Moxibustion

    Warms cold-type diarrhoea and cold in the lumbar region.

    Cautions

    Deep needling near the sciatic distribution — avoid provoking radicular pain.

    Classical pairings

    • ST-25 Tiān Shū — Front-Mù of the Large Intestine
    • LI-4 Hé Gǔ — Yuán-source of the Large Intestine
    • GB-30 Huán Tiào — combined for sciatica

    Open in the point database

    View live location diagrams, additional research citations and full needling metadata for BL-25.

    Open BL-25 in the point database →

    Educational reference for licensed practitioners and students. Not medical advice — always correlate with a full TCM assessment and Western clinical judgement.