Lung cancer is one of the malignant tumors with the fastest growth in morbidity and mortality, and the greatest threat to human health and life. In the past 50 years, many countries have reported that the incidence and mortality of lung cancer have increased significantly. The incidence and mortality of lung cancer in men accounted for the first place in all malignant tumors, the incidence in women accounted for the second place, and the mortality rate ranked second.

Lung cancer does cause weight loss Decline, but weight loss is not necessarily lung cancer. The clinical manifestations of lung cancer are more complicated. The presence, severity, and sooner or later of symptoms and signs depend on the location of tumor, pathological type, metastasis, and complications, and Differences in patient response and tolerance. The early symptoms of lung cancer are often mild, even without any discomfort. The symptoms of central lung cancer appear early and severe, and the symptoms of peripheral lung cancer appear late and mild, or even asymptomatic. They are often found during physical examination. The symptoms of lung cancer are roughly divided into: local symptoms, systemic symptoms, extrapulmonary symptoms, infiltration and metastatic symptoms.

Lung cancer loss of appetite due to infection and pain, increased consumption of tumor growth and toxins, and increased levels of cytokines such as TNF and Leptin in the body can cause severe wasting, anemia, and cachexia. Cancer cells engulf and consume the body''s functions, so it will cause weight loss, the patient will look very thin, away from lung cancer, not only to quit smoking, but also to develop good habits, usually keep away from radiation, taste as light as possible, and maintain Good mindset.