Chest tightness with dry cough is considered to be caused by bronchial asthma, chest tuberculosis, bronchiectasis, cough variant asthma and so on. 1. Bronchial asthma: As bronchial asthma is a disease characterized by chronic inflammation and hyperresponsiveness of the airways. Certain factors can cause spasm of the airways, resulting in restricted airflow, which in turn causes symptoms such as chest tightness, dry cough, shortness of breath or dyspnea. 2. Chest tuberculosis: Chest tuberculosis such as pulmonary tuberculosis and bronchial tuberculosis cause damage to lung tissue or bronchial tubes due to tuberculosis bacillus, which affects lung function, thus affecting the respiratory function and causing symptoms such as chest tightness and dry cough. Chest tuberculosis is often accompanied by fever, emaciation, hemoptysis and other symptoms. 3. Bronchial dilatation: Bronchial dilatation is usually caused by lung inflammation, so there will be obvious cough. Bronchiectasis may be complicated by pulmonary alveoli, and when pulmonary alveoli rupture occurs when pneumothorax occurs, symptoms such as chest tightness and dyspnea may appear. 4. Cough variant asthma: Cough variant asthma is often caused by allergies and is a special type of asthma. Due to inhalation or contact with allergens, such as pollen, dust, cold air and other airway obstruction, hyperreactivity, airway mucosal contraction and spasm, resulting in chest tightness, dry cough symptoms. Symptoms of chest tightness and dry cough need to go to the hospital in time to check the specific cause and treatment, so as not to delay the condition.