Chest tightness, shortness of breath and dyspnea in young people are mostly seen in three situations, as follows: 1. The presence of bronchial asthma, which can manifest itself as chest tightness, shortness of breath and dyspnea during an attack of bronchial asthma. Bronchial asthma is a chronic inflammatory disease of the airways, mostly seen in young people, and acute attacks will occur with bronchial constriction and spasm, which can lead to chest tightness, shortness of breath and dyspnea symptoms. 2, the presence of a large amount of pleural effusion, due to the presence of pleural effusion, resulting in severe compression of lung tissue, which can affect the lung ventilation function, causing chest tightness, shortness of breath, dyspnea, especially in young people, mostly seen in tuberculosis Pleural effusion caused by pleurisy. 3, the presence of spontaneous pneumothorax, young people with spontaneous pneumothorax can also compress lung tissue, causing chest tightness, shortness of breath, dyspnea and other symptoms. Therefore, patients need to promptly improve chest X-ray, lung function, allergen screening, etc. for clarification.