Fever returns after one day and night of fever subsiding

Fever reduction means antipyresis. Fever refers to an elevated body temperature. Recurrence of fever after one day and night of defervescence may be caused by infections, drug reactions, immune responses, bronchitis, pneumonia, or other reasons, requiring targeted management. Specific analyses are as follows:

1. Infection

One common cause of the aforementioned situation is infection. Patients may still have bacterial, viral, or other pathogen-induced infections even after their fever subsides. It may take a longer time for the immune system to completely eliminate the infection, which can lead to a recurrence of fever.

2. Drug Reaction

Certain medications may cause fever or drug allergies. If a patient develops fever after taking medication, they should immediately contact their doctor to determine whether it is related to the drug.

3. Immune Response

The immune system may undergo various changes while fighting an infection. Even after pathogens are cleared, the immune system may remain in a highly activated state, leading to elevated body temperature.

4. Bronchitis

Patients with bronchitis may experience symptoms such as coughing, sputum production, and shortness of breath. As the condition worsens, the aforementioned phenomenon may occur. Medications such as ambroxol hydrochloride tablets or azithromycin tablets may be taken as directed by a physician for symptom relief.

5. Pneumonia

If upper respiratory tract infections are not properly treated, inflammation may spread into the lungs and lead to pneumonia. Under inflammatory stimulation, patients may experience recurrent fever. Medications such as doxycycline hyclate tablets or acyclovir tablets may be used under medical guidance to alleviate symptoms.

If any discomfort occurs, individuals should seek timely medical evaluation and treatment to avoid delays in managing the condition.