Colds do not cause allergies, but they can cause attacks of allergic diseases such as cough variant asthma, or allergic rhinitis. Colds are caused by viral infections and usually present with manifestations related to runny nose, sneezing, sore throat, cough, and even low fever. It should be pointed out that if the patient has some allergic diseases, sometimes there will be aggravation in the cold, such as allergic rhinitis, cough variant asthma and other related diseases, these diseases will be aggravated in the time of allergy, and may also induce aggravation in the time of cold, which may lead to repeated clear nasal discharge and sneezing, and may also cause aggravation of cough symptoms, so for the cold accompanied by Therefore, if a cold is accompanied by allergic manifestations, it should be investigated for the above mentioned underlying diseases.