How does lungs cancer kill u? And what happen to u?

Lung Cancer . The complications of lung cancer include malignant cachexia ( debilitating wasting), pneumonia, metastatic disease to the brain or other organs, and collapse of the lung, among other complications. Infection and metastatic disease are often the terminal complications. Your oncologist can provide specific guidance and recommend palliative care to relieve the worst symptoms.
Cancer and death. Lung cancer can cause death through different mechanism- among of them will include- 1. Respiratory failure- due to the obstruction of major airway or massive involvement of lung cancer to lung/chest cavity 2 infection due to poor nutrition status 3 coughing up blood/hemoptysis- resulting in aspiration 4 blood clots in the lung 5 spreading to brain causing increase pressure in the brain and death.