Slightly stuffy nose but fever in the afternoon - causes

When a patient develops a fever in the afternoon after experiencing nasal congestion, it usually suggests a possible acute upper respiratory tract infection.

This condition is commonly seen in viral colds, influenza, or bacterial infections. Viral infections should be the primary consideration, especially during seasonal outbreaks, such as coronaviruses, influenza viruses, adenoviruses, and others. Bacterial infections, such as streptococcal pharyngitis, may also initially present with nasal congestion followed by the development of fever.

In addition, sinusitis may cause headache, nasal congestion, and fever, with the rise in body temperature during the afternoon possibly related to periodic changes in inflammatory activity. Although allergic rhinitis itself does not directly cause fever, long-term exposure to allergens can lead to inflammation of the nasal mucosa, thereby increasing the risk of infection, which may subsequently cause fever.

Patients are advised to seek timely medical attention to determine the underlying cause through professional examinations (such as complete blood count and throat swab culture) and to follow medical guidance for appropriate treatment measures to prevent further progression of the condition. Maintaining good personal hygiene, engaging in regular exercise, and enhancing immunity can help prevent such diseases.