Necrosis is a medical term that refers to the death of cells or tissues in the body. This can happen due to various reasons, such as lack of blood flow, infection, or injury. When cells die, they can release harmful substances that may cause inflammation and damage to surrounding tissues. There are different types of necrosis, including coagulative necrosis, which often occurs after a heart attack, and caseous necrosis, commonly associated with tuberculosis. Understanding necrosis is important for diagnosing and treating conditions that can lead to tissue damage and loss, helping to prevent further complications.