Patients with lung cancer will have pain, and the specific reasons are analyzed as follows: 1. Patients with early stage lung cancer usually have respiratory symptoms, accompanied by coughing, coughing sputum or blood in sputum, chest tightness, shortness of breath, etc., which can cause pain in bronchus and chest; 2. Late stage patients with bone metastasis will destroy bone tissue and cause pathological pain, and if distant metastasis such as liver, kidney and adrenal gland occurs, it can cause pain in the corresponding parts If there are distant metastases such as liver, kidney and adrenal glands, it can cause pain in the corresponding areas, and even changes in pleural fluid and ascites, causing chest pain, abdominal pain and intestinal obstruction; 3. In short, lung cancer patients will have pain, even generalized pain, and sometimes the pain will be unbearable.