What is Cold Obstruction Syndrome?
Cold Obstructive syndrome, bi syndrome, or Bi Zheng, is caused by invasion of exterior pathogenic factors, such as wind, cold, dampness, and heat, which obstruct the channels and collaterals, disturbing the blood circulation and Qi flow.

The syndrome is characterized by localized discomforts in the muscles, joints and tendons. Major complaints include soreness & pain, numbness, heaviness, difficulty in movement, and/or swollen joints that are warm to the touch. In some cases, deformity of the joints is apparent.

B Zhng may affect the muscles, tendons, bones and joints.

Adopted from manumissio.wikispaces.com