A dry cough cannot indicate cancer. Dry cough is a common clinical symptom that can occur in a wide range of diseases. Cancer is just one of the diseases that present with dry cough symptoms. Cancer: Cancer with dry cough as the main manifestation is lung cancer or lung metastases, usually occurring in the morning or at night. Early cancer patients with dry cough symptoms are mild, and with the progression of the disease, it may be accompanied by hemoptysis, chest tightness, and dyspnea. Other respiratory diseases: Cough is a common non-conditional reflex, dry cough is often accompanied by a clear sensation of a foreign body in the oropharynx, which can be seen in a variety of respiratory diseases, such as: chronic pharyngitis, acute or chronic laryngitis, cough variant asthma and other diseases. Most of them are caused by allergies or infections, and some of them are poorly treated and persistent. To sum up, patients do not need to be overly nervous when they have dry cough symptoms, they should go to specialized hospitals in time, and improve relevant auxiliary examinations under the guidance of specialists. If the diagnosis of tumor disease is confirmed, the patient should actively cooperate with specialist treatment to prolong the survival time and improve the quality of life.