Coughs caused by colds for up to two months fall into the category of subacute coughs. Subacute cough can be caused by a variety of reasons, including post-infectious cough, upper airway cough syndrome, cough variant asthma and other diseases. Treatment can be given to cough suppressant therapy, antihistamine therapy, inhaled glucocorticoid therapy and so on. 1. Post-infectious cough: Common cold can often cause post-infectious cough. Post-infectious cough is mostly characterized by irritating dry cough or coughing up a small amount of white mucus sputum, which usually lasts for 3 to 8 weeks. Post-infectious cough is often self-limiting and can be relieved on its own. If the symptoms are severe, cough suppressants such as dextromethorphan can be used. 2. Upper airway cough syndrome: mainly caused by nasal diseases, secretion backflow of the nose and throat and other parts of the cough. Mainly given antihistamine treatment such as chlorpheniramine maleate. 3. Cough variant asthma: related to airway hyperresponsiveness, often causing dry cough, can be treated with budesonide formoterol powder inhaler and so on. There are many other causes of subacute cough, if the cough is not relieved or aggravated, it is recommended to consult a doctor in a timely manner, improve the relevant examination, clarify the cause of the disease, and active treatment.