Inflammation in the body is an inflammatory response by the body’s innate immune system to repair and restore itself in order to remove harmful substances or pathogens from the body. There are many causes of inflammation in the body, including biological, physical and chemical factors. 1. Biological factors, inflammation caused by pathogenic microbial infections, such as bacteria, viruses, rickettsiae, mycoplasma, fungi, spirochetes, and parasites, etc., which produce metabolic and toxic substances during the process of growth, reproduction, and proliferation in the body, thereby damaging the body’s cells and tissues and causing inflammation to occur. 2. Physical factors: mainly by radioactive substances, high, low temperature, ultraviolet light and other physical factors to stimulate the inflammatory reaction, the intensity of its reaction with the type, intensity and time of stimulation. 3. Chemical factors: exogenous and endogenous, exogenous including strong acid, strong alkali, strong oxidizing agents, etc.; endogenous mainly from the decomposition products produced by the described necrotic tissue, urea, uric acid, etc.. 4. Necrotic tissue: the body’s own tissue ischemia, hypoxia, etc. caused by tissue necrosis and inflammatory reaction. 5. Immune response: the body’s excessive defense response to foreign components, causing damage to its own tissues and cells and inflammation occurs. The manifestation of inflammation is divided into systemic and local symptoms, systemic symptoms such as fever, fatigue, loss of appetite, muscle pain and other manifestations, local redness, swelling, heat, pain and dysfunction and other manifestations. The treatment of inflammation is targeted and individualized, when inflammation occurs in the body, it is necessary to go to a regular hospital in time, under the guidance of the doctor to carry out relevant examinations, to find the causative factors, and for the cause of the disease treatment.