Weizhong (BL40)
Weizhong (BL40), “Middle of the Bend”, is a point on the Bladder meridian. It is point 40 of the 67 on the channel. Master point for the back and waist.
Location
At the midpoint of the popliteal crease, between the tendons of the biceps femoris and semitendinosus.
Functions according to tradition
Master point for the back and waist. Activates Bladder channel, relieves lumbar pain, cools Blood, treats skin diseases.
Traditional indications
- Acute lower back pain
- Knee pain
- Skin problems (acne, eczema)
- Blood heat
- Heatstroke
Indications described by tradition; they do not amount to proven clinical effectiveness for each one.
What its classification means
Last of the transport points, near the elbow or knee: the Qi “goes deep” and joins the organ. It has been used for disorders of the fu organs and the Stomach.
It belongs to the small group of points that tradition associates with an entire region of the body (Zusanli with the abdomen, Weizhong with the back, Lieque with the head and nape, Hegu with the face and mouth…).
Precautions
Avoid injuring the popliteal vein and artery; do not apply overly strong stimulation.
Points on other channels with similar indications
They share several traditional indications with this point. Comparing them helps understand why one or the other is chosen.
- GB34 Yanglingquan (Gallbladder): Knee pain
- KI10 Yingu (Kidney): Knee pain
- LV7 Xiguan (Liver): Knee pain
- SP10 Xuehai (Spleen): Knee pain
- SP9 Yinlingquan (Spleen): Knee pain
- ST34 Liangqiu (Stomach): Knee pain
Point profile
- Code
- BL40
- Pinyin name
- Wěi Zhōng
- Characters
- 委中
- Translation
- Middle of the Bend
- Meridian
- Bladder
- Element
- Water
- Classification
- He-Sea, Command point
- Topics
- Lower Back, Knee, Skin
Health notice. Educational and study content. It describes concepts of Traditional Chinese Medicine and does not replace diagnosis or treatment by a healthcare professional. Needling, medicinal herbs and invasive techniques must be applied by trained professionals. Safety guide.
