My son age 6 years had high fever 103 on 2 nd which ended on 4th .. had high fever at interwal of 4 to 6 hrs …. Now after two days again his body ia warm n gets 100 temperature once in 24 hrs … why it’s happening like this ??

A. Types of fevers A high grade fever happens when your body temperature is 103°F (39.4°C) or above. Most fevers usually go away by themselves after 1 to 3 days. A persistent or recurrent fever may last or keep coming back for up to 14 days