Bladder Meridian

Weiyang BL39: Nomenclature, Location, Functions, Indications

Yang means "exterior". Weiyang is lateral to Weizhong (BL40) on the transverse crease of the popliteal fossa.


Wei: crooked Yang: Yang of yin-yang
Yang means “exterior”. Wei-Yang is lateral to Weizhong (BL40) on the transverse crease of the popliteal fossa.
Point: BL39
Chinese Name: 委阳
English Name/Meaning: Outside of the Crook
Pinyin: wěi yáng
Han Geul 한글: wi yang 위양
Romaji: i yō
Vietnamese:Ủy dương


Lateral to Weizhong (BL40), on the medial border of the tendon of biceps femoris.

Functions of Weiyang:

  • Regulates water pathway.
  • Benefits Urinary Bladder.


Stiffness and pain of the lower back, distension and fullness of the lower abdomen, edema, dysuria, enuresis, cramp of the leg and foot.


Perpendicular insertion 1 to 1.5 cun.


Lower he-sea point.


Dr. Ishwar Gyawali is Consultant Acupuncturist and Ayurveda Physician from Kathmandu, Nepal. He had completed BAMS (Bachelor of Ayurveda Medicine and Surgery), a five and half year course on Ayurveda Medicine from Kirtipur Campus affiliated to Tribhuvan University ,Institute Of Medicine, Nepal under scholarship in 2011. He had completed his MD in TCM from Nanjing University Of Chinese Medicine in 2016 under scholarship of Ministry of Education, Nepal. With an experience of Serving for Government of Nepal for 2 years and private practise for more than 5 years, he has sound knowledge in Ayurveda as well as Chinese Medicine. He is a registered Doctor in NAMC (Nepal Ayurveda Medical Council ) both as a physician as well as TCM/Acupuncture Specialist.