Concept Zhou Tong is a condition characterized by pain in the elbow joint.It belongs to Bi Syndrome"in TCM,and is named Zhou Lao(肘劳).It is often caused by exogenous wind,cold and dampness,physical overstrain or traumatic injuries.Concept Zhou Tong is a condition characterized by pain in the elbow joint.It belongs to “Bi Syndrome”in TCM,and is named “Zhou Lao”(肘劳).It is often caused by exogenous wind,cold and dampness,physical overstrain or traumatic injuries