BL24 Qi Sea Shu

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

BL24 (Qì Hǎi Shū, “Qi Sea Shu”) is an acupuncture point on the Bladder Meridian. BL24 is located on the back, 1.5 cun lateral to the lower border of the spinous process of the third lumbar vertebra (L3). It regulates Qi, strengthens the lower back, and benefits the Kidneys.

Location

BL24 is located on the back, 1.5 cun lateral to the lower border of the spinous process of the third lumbar vertebra (L3).

Needling

Oblique insertion medially 0.8-1.2 cun.

TCM functions

Regulates Qi, strengthens the lower back, and benefits the Kidneys.

Indications

Lower back pain, abdominal pain, irregular menstruation, dysmenorrhea.

Clinical notes

BL24 is a significant point for regulating Qi in the lower abdomen and strengthening the lower back, particularly when associated with Kidney and Qi deficiencies. It is often used for lumbar pain, weakness in the lower extremities, and conditions related to the Kidneys and reproductive system. While not a Shu point of an organ, its proximity to the 'Sea of Qi' (REN6) suggests its role in influencing the body's fundamental Qi. It is commonly used with BL23 for comprehensive lower back and Kidney support.

On the Bladder channel

BL24 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL24 located?

BL24 is located on the back, 1.5 cun lateral to the lower border of the spinous process of the third lumbar vertebra (L3).

What is BL24 used for?

BL24 regulates Qi, strengthens the lower back, and benefits the Kidneys. Common clinical indications include lower back pain, abdominal pain, irregular menstruation, dysmenorrhea.

How is BL24 needled?

Oblique insertion medially 0.8-1.2 cun.

Which meridian is BL24 on?

BL24 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.