What causes colds and fevers to come back?

If you have a cold with a recurring fever, you should consider whether it is caused by other diseases such as pneumonia, influenza, or infectious mononucleosis.
1. Pneumonia: Pneumonia is very similar to a cold in its early stages, characterized by a recurring fever, accompanied by sneezing, runny nose, coughing, coughing up sputum and other symptoms. If the fever persists and the cough is obvious, beware of the possibility of pneumonia.
2. Influenza: It is a respiratory tract infection caused by A and B influenza viruses. Early systemic symptoms are dominant, followed by respiratory symptoms such as cough and sputum.
3. Infectious mononucleosis: The early manifestations of this disease are fever, sore throat, swollen lymph nodes, and cold symptoms are very similar.
Cold and fever recurring, it is recommended to go to the hospital in a timely manner to clarify whether the combination of other diseases, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.