How does lung cancer affect the body?

Lung cancer primarily affects the respiratory system, where it can obstruct airways, leading to difficulty in breathing, persistent cough, and chest pain. As the cancer progresses, it may spread (metastasize) to other parts of the body, impacting organs like the liver, bones, and brain, which can result in various systemic symptoms such as fatigue, weight loss, and pain. The disease can also compromise the immune system, making the body more vulnerable to infections. Overall, lung cancer significantly disrupts normal bodily functions and can lead to serious health complications.