A low-grade fever from a cold is caused by a viral infection, while a secondary bacterial infection can also cause a fever.
Colds are upper respiratory tract infections, and upper respiratory tract infections are usually caused by viral infections. Viruses enter the body after continuous replication, reproduction, can cause a local inflammatory response, which is manifested in a marked increase in body temperature, fever symptoms.
General upper respiratory tract infections can be controlled after targeted antipyretic treatment. However, if fever recurs after the use of antipyretics, it may be related to secondary bacterial infections.
If you have a recurring fever, you should consult a doctor for blood tests to determine the cause of the fever, and follow the doctor’s instructions for medication.