The recurrence of fever after taking medication to reduce the fever may be related to the use of antipyretic medication that does not target the cause of the illness and does not control the condition, or it may be related to secondary bacterial infections or complications of the cold. Colds are caused by viral infections and can have symptoms such as fever and weakness. If the cold is caused by a common cold, it is usually treated symptomatically and can be cured on its own. If it is caused by influenza, only the use of antipyretic drugs, can not effectively inhibit viral replication to control the disease, then there may be recurrent fever. Secondly, if the cold is secondary to a bacterial infection, the fever may not be controlled despite the use of antiviral drugs, and antibiotics may be needed to control the infection. Complications of the cold, such as bronchopneumonia, can also cause recurrent fever and require aggressive anti-infective treatment. Recurrent fever can also be caused by other diseases, such as tonsillitis and autoimmune diseases. If recurrent fever occurs, it is recommended to consult a doctor in time, complete the examination, clarify the cause of the disease, and standardize the treatment under the guidance of the doctor, so as to avoid delaying the condition.