Entering winter, there are more people coughing around. Some people find coughing very common and do not take it seriously; Some people also suffer from coughing and cannot find the cause. In fact, behind a small cough, there may be various diseases hidden, and if not taken seriously, it can even endanger life. 1、 Deadly cough: cough caused by COPD, lung cancer, heart failure, pulmonary embolism, etc. 1. Characteristics of COPD cough: · It occurs frequently in autumn and winter. It is often accompanied by expectoration, which is mostly white sticky sputum or foam like sputum. Some patients only have paroxysmal cough in the morning. After a large amount of sputum is discharged, they may not cough for a day. The hazards of chronic obstructive pulmonary disease (COPD) include difficulty breathing and decreased activity tolerance. Severe cases can lead to respiratory failure and even endanger life. Typical department for consultation: Respiratory Clinic (Respiratory and Critical Care Medicine Department) 2. Characteristics of Lung Cancer Cough: The cough caused by lung cancer is related to the location of the tumor. If the tumor grows near a larger bronchus, it may cause bronchial stenosis or even obstruction, and relatively high pitched metallic sounds may appear during coughing. ·If the tumor growth site does not compress the large trachea and bronchi, the cough caused by lung cancer may not be much different from that caused by bronchitis or pneumonia. ·Not all coughs caused by lung cancer will have blood in the sputum. If you have chronic cough, are over 50 years old, smoke for a long time, have a family history of lung cancer, cough with blood in the sputum, and experience weight loss in a short period of time, you should go to the hospital for lung cancer screening in a timely manner. Usually seeking medical attention from a respiratory clinic (respiratory and critical care medicine department). Based on the CT examination results, the doctor may recommend seeking medical attention from a thoracic surgery or oncology department. 3. The characteristics of cough caused by heart failure: relatively more coughing at night, especially in the latter half of the night. ·Closely related to body position: Coughing is often pronounced when lying flat, but it is relieved when sitting or standing. ·Patients may have limited physical activity during daytime activities. ·The first is dry cough, or white foam like sputum, serious cases can cough pink foam like sputum. Patients often have a history of heart disease or risk factors for heart disease, such as long-term hypertension, diabetes, obesity, etc. Typical departments for consultation: Cardiology or Emergency Department. 4. Characteristics of cough caused by pulmonary embolism: Cough often accompanies chest tightness, dyspnea, restlessness, and low fingertip blood oxygen. It is necessary to seek medical attention as soon as possible. Pulmonary embolism is a dangerous disease that can lead to heart failure and respiratory failure in severe cases. Failure to handle it promptly may endanger life. Typical departments for consultation: Cardiovascular Department or Respiratory Clinic (Respiratory and Critical Care Medicine Department). 2. Common Coughing: 1. Postinfection Coughing. Influenza, Mycoplasma pneumoniae, etc. can cause respiratory infections. After the acute symptoms of respiratory infections disappear, coughing still persists and is clinically referred to as post infection cough. This type of cough has the following characteristics: · Dry cough is frequent, some are accompanied by phlegm · Sometimes cough persists, worsens at night · It often takes about 3-8 weeks to recover, and some people cough for more than 8 weeks. Usually, they visit the respiratory clinic (respiratory and critical care medicine department). 2. Cough caused by postnasal drip syndrome refers to abnormal nasal and sinus conditions