Difficulty in breathing after a cold may be related to edema and congestion in the nasal cavity or throat, which needs to be treated with glucocorticosteroids such as prednisone, dexamethasone, prednisone, and so on; or it may be related to inflammation in the lungs, which needs to be treated with antibiotics such as cefuroxime tablets, roxithromycin, levofloxacin, and so on. 1. Upper respiratory tract infections: cause obvious edema and congestion in the nasal cavity or throat, usually manifested as nasal congestion, runny nose, sneezing, coughing, coughing up phlegm, fever, fatigue, sore throat and other symptoms. Antihistamine drugs, such as loratadine, are used for treatment. 2. Pneumonia: generally manifested as fever, cough, cough sputum, chest tightness, breathlessness and other symptoms. Antibiotic drugs such as cefuroxime tablets, roxithromycin, levofloxacin, etc. are used to control the infection in the lungs. In conclusion, when dyspnea occurs, consult a doctor for timely examination, such as blood test, chest X-ray or CT to make a clear diagnosis and treat the cause.