The objective of this study is to characterize frayed fiber under high resolution microscope to unveil fiber fraying.Thus, a latest and newly-built theory responsible for fiber fraying during refining process has been proposed in this paper. With convincing reasoning and speculation, this newly established theory proposed in this paper could go through various visible phenomena and effects of frayed fibers as published earlier. This theory proposes that frayed fibers are generated based on the integration of splitting and locally high consistency mechanisms. In other words, the intensive external fibrillation responsible for splitting and locally high consistency theory is one of the most important effects of refining on frayed fiber generation.