BL45 Oh My!

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

BL45 (Yixi, “Oh My!”) is an acupuncture point on the Bladder Meridian. It is located on the back, 3 cun lateral to the posterior midline, at the level of the lower border of the spinous process of the 7th thoracic vertebra (T7). This point is located 1.5 cun lateral to BL17. It regulates lung qi, alleviates cough and asthma, relaxes sinews.

Location

On the back, 3 cun lateral to the posterior midline, at the level of the lower border of the spinous process of the 7th thoracic vertebra (T7). This point is located 1.5 cun lateral to BL17.

Needling

Oblique insertion 0.5-0.7 cun. Caution: pneumothorax.

⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

TCM functions

Regulates lung qi, alleviates cough and asthma, relaxes sinews.

Indications

Cough, asthma, pain in the shoulder and back.

Clinical notes

Yixi is primarily known for its action on the lungs, making it a valuable point for various respiratory conditions. It is frequently used to address cough, asthma, and wheezing, particularly when there is a sensation of oppression in the chest. Its ability to relax sinews also makes it useful for local pain in the scapular region. It can be paired with BL13 (Feishu) for enhanced lung regulation.

On the Bladder channel

BL45 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL45 located?

BL45 (Yixi) is located on the back, 3 cun lateral to the posterior midline, at the level of the lower border of the spinous process of the 7th thoracic vertebra (T7). This point is located 1.5 cun lateral to BL17.

What is BL45 used for?

BL45 regulates lung qi, alleviates cough and asthma, relaxes sinews. Common clinical indications include cough, asthma, pain in the shoulder and back.

How is BL45 needled?

Oblique insertion 0.5-0.7 cun. Caution: pneumothorax. Caution: ⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

Which meridian is BL45 on?

BL45 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.