There are many causes of prolonged cold symptoms, such as recurrent colds, allergic rhinitis, and allergic coughs. It can be treated by general treatment and medication, etc. 1. Repeated colds: If the patient has often stay up late, overwork, not pay attention to keep warm, etc., it is easy to often induce colds. Secondly, if the patient has underlying diseases that affect immunity, such as diabetes, etc., he/she will also catch colds frequently. We can improve the lifestyle by paying attention to rest, avoiding cold, not staying up late, moderate exercise, etc., and at the same time, actively treating the primary disease to improve the recurrent colds. 2. Allergic rhinitis: Allergic rhinitis is mainly caused by contact with allergens, and symptoms such as sneezing, runny nose and nasal congestion may occur. First of all, you need to stay away from allergens, and secondly, you can take chlorpheniramine maleate tablets, levocetirizine hydrochloride tablets and other drugs to treat it. 3. Allergic Cough: Allergic cough is mainly caused by contact with allergens, which will cause repeated irritating cough and other symptoms. First, you need to stay away from allergens, and second, you can take loratadine tablets, levocetirizine hydrochloride tablets and other drugs to treat it. Long-term cold symptoms may also be caused by rhinitis, sinusitis, otitis media and other diseases, or manifested as cold symptoms of underlying diseases (such as rheumatoid immune diseases) in the early stages, such as symptoms do not ease or aggravate, it is recommended to consult a doctor in a timely manner, improve the examination, to clarify the cause of the disease, and comply with the doctor’s instructions for treatment.