Inflammatory changes refers to the trauma or the organization of the body appeared pathological changes, due to a variety of exogenous and endogenous damage factors, caused by the body cells and tissues of a variety of injuries and changes, the body’s local and systemic will also cause corresponding complex changes and reactions, collectively referred to as inflammatory changes. They can be divided into the following three categories: metamorphosis, exudation and hyperplasia. Metamorphosis refers to the localized degeneration or necrosis caused by inflammation. Exudation refers to the localized intravascular component of inflammation, which is caused by the infiltration of inflammatory cells that change the permeability of blood vessels, resulting in their leakage into the tissue or body cavity. Hyperplasia includes proliferation of parenchymal and mesenchymal cells, mostly caused as a result of inflammatory stimuli.