Lesions, also known as pathological changes, are local or systemic changes in cells or tissues and organs affected by a variety of pathogenic factors, and represent diseases of the organism from the point of view of medical diagnosis. Lesions belong to a more general statement, including inflammation, trauma, tumors, etc., different parts of the lesions and different degrees of lesions will show different clinical manifestations, such as fever, pain, swelling, bleeding, coughing, coughing phlegm and diarrhea, and so on. For relatively minor lesions, the body can repair itself without too much intervention. For serious lesions that affect daily life and safety, standardized treatment is needed. It is important to consult a doctor for a comprehensive analysis of any lesion.