Cancer is considered to be a serious and often life-threatening condition due to several reasons: 1. Uncontrolled Cell Growth: Unlike normal cells, cancer cells multiply uncontrollably and do not undergo the normal processes of cell death (apoptosis), leading to the formation of a mass known as a tumor. 2. Invasion and Metastasis: Cancer cells can invade nearby tissues and spread to other parts of the body through the bloodstream or lymphatic system in a process known as metastasis, which makes the disease more difficult to treat. 3. Damage to Healthy Tissues: As a tumor grows, it can damage healthy tissues and organs, disrupting their normal function. 4. Resource Drain: Cancer cells often consume a significant amount of the body's resources, which can lead to weight loss, fatigue, and a weakened immune system. 5. Treatment Side Effects: Treatments for cancer, such as chemotherapy and radiation, can have severe side effects that impact a person's quality of life and sometimes cause long-term health issues. 6. Psychological Impact: The diagnosis and treatment of cancer can have profound psychological effects on patients and their families, including stress, anxiety, and depression. 7. Economic Burden: The cost of cancer care can be substantial, placing a financial strain on individuals, families, and healthcare systems. 8. Mortality: Some types of cancer are particularly aggressive and can lead to death if not detected and treated early. read more >>

Cancer happens when cells that are not normal grow and spread very fast. Normal body cells grow and divide and know to stop growing. Over time, they also die. ... A growing tumor becomes a lump of cancer cells that can destroy the normal cells around the tumor and damage the body's healthy tissues.read more >>