Histopathology is the study of changes in tissues and cells at a microscopic level to diagnose and treat diseases. It involves examining tissue samples obtained from biopsies or surgical procedures under a microscope to identify abnormal cellular structures, inflammation, infections, and other pathological changes. Histopathology is used in various medical fields, including pathology, oncology, dermatology, and forensic science, to help diagnose and manage diseases. It plays a crucial role in determining the extent of diseases, predicting their progression, and guiding appropriate treatment strategies.