The causes of vaginal discharge can be divided into two general categories, internal causes and external causes, with damp evil being the primary factor. In the western medical system it includes inflammation of various organs of the reproductive system. Vaginal discharge can also be divided according to pattern, generally into vacuity patterns and repletion patterns. Clinically most situations manifest as vacuity repletion complexes, with spleen and kidney vacuity weakness and damp heat evil being the two primary patterns.