Patients with lung cancer may not necessarily fart all the time, and farting all the time is not a typical symptom of lung cancer. Lung cancer is a malignant tumor that occurs in the lungs, and such patients often have symptoms such as coughing, hemoptysis, chest pain, progressive wasting, etc. However, malignant tumors in the lungs usually do not cause the symptom of farting all the time. However, lung cancer metastasized to stomach and intestines may also show the above symptoms. Farting all the time may be caused by eating a large amount of food that produces too much gas, such as white radish, etc. It may also be caused by indigestion that leads to abnormal peristalsis of intestines, which in turn leads to excessive accumulation of gas in the intestines. Lung cancer is a more serious malignant tumor disease, once diagnosed, timely treatment is needed, and early and effective treatment can improve the prognosis.