Why does cancer happen?

Cancer is a complex disease that can be caused by a variety of factors, including genetics, lifestyle, and environmental exposures. Some of the key factors that contribute to cancer development include:

Genetic mutations: Cancer cells have abnormal changes in their DNA, which can alter the way they grow and divide. These mutations can be inherited or can occur spontaneously due to environmental factors such as radiation or chemicals.

Cell growth and division: Cancer cells divide rapidly and uncontrollably, forming tumors. This abnormal growth can damage surrounding tissues and organs, disrupt normal bodily functions, and lead to various symptoms and health problems.

Immune system dysfunction: The immune system plays a crucial role in recognizing and destroying cancer cells. However, in some cases, cancer cells can evade the immune system, allowing them to grow and spread unchecked.

Lifestyle factors: Certain lifestyle choices, such as smoking, excessive alcohol consumption, unhealthy diet, lack of physical activity, and exposure to certain chemicals, can increase the risk of developing cancer.

Environmental factors: Environmental exposures, such as radiation, certain chemicals, air pollution, and occupational hazards, can damage cells and contribute to cancer development.

It's important to note that cancer is usually a multifactorial disease, meaning that it can result from a combination of genetic, lifestyle, and environmental factors. Understanding these risk factors can help individuals make informed choices to reduce their risk of developing cancer and promote overall health.