The chest tightness and shortness of breath after a cold need to consider the following conditions: first of all, we should consider whether it is combined with pneumonia, the patient may be accompanied by fever, cough, coughing, need to do chest X-ray and lung CT to clarify the diagnosis; secondly, when the patient has chronic bronchitis or emphysema in the past, the patient will have chest tightness and shortness of breath when he/she has a cold, the cold causes infection to aggravate the original chronic bronchitis and emphysema, resulting in a decline in lung function, so If you have chest tightness and shortness of breath after activity, it is recommended to do pulmonary CT and pulmonary function tests to clarify the diagnosis; again, if you have chest tightness and shortness of breath after a cold, you should also pay attention to exclude myocarditis.