How many days does a child's viral fever last?

Sep 05, 2025 Source: Cainiu Health
Dr. Zhou Xiaofeng
Introduction
The duration of viral fever in children is influenced by the type of virus, the child's physical condition, and the care provided. Most cases last 3–5 days, while fevers caused by certain specific viruses or in children with weaker constitutions may extend to 5–7 days. During a viral fever, it is important to ensure the child gets adequate rest, stays well-hydrated, and receives appropriate fever-reducing measures based on body temperature. Overwrapping the child should be avoided to prevent impaired heat dissipation.

Generally speaking, the duration of viral fever in children is influenced by the type of virus, the child's constitution, and care provided. In most cases, the fever lasts for 3-5 days; however, in cases involving certain specific viral infections or children with weaker constitutions, the fever may extend to 5-7 days. Detailed analysis is as follows:

In common viral infections, such as fevers caused by the common cold virus, the fever typically lasts 3-5 days. These fevers are often moderate to low-grade, and the child generally maintains a good mental state with mild accompanying symptoms. With appropriate care, body temperature will gradually decrease and the child will slowly recover.

If infected with specific viruses, such as influenza virus or adenovirus, the fever may last for 5-7 days and is often accompanied by recurring high fever. The child may exhibit symptoms such as poor mental state and fatigue. Additionally, children with weaker constitutions or lower immunity may experience slower virus clearance, which could prolong the fever duration.

During a child's viral fever, it is important to ensure adequate rest, increase fluid intake, and appropriately use fever-reducing measures according to body temperature, avoiding excessive bundling that may hinder heat dissipation. At the same time, maintain good indoor air circulation and provide light, easily digestible food to help the body fight the virus and promote recovery.

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