Ba Gang
Ba Gang - or the 8 syndromes, is an additional tool in TCM to obtain an exact and comprehensive diagnosis. Ba Gang can very well be applied separately or in combination with other modalities. Ba Gang is a combination of yin and yang (internal - external, cold - warm, depletion - excess).
An example: A sprained ankle shows external-heat-excess (external, infected / warm / red, swollen) and is therefore a typical yang syndrome. Also, the combination with the so-called aetiological (causal) factors are very typical. These can be externally induced (exogenic: cold, humidity, heat, etc.) or internally induced (endogenous: emotions).