Why does a fever come?

Normally our body temperature stays between 98-99° Fahrenheit but sometimes due to our carelessness or seasonal imbalance or the attack of the bacteria in the body between the functions of the body 

Balance gets deteriorated

Causing our body to produce more enzymes, hormones and more blood corpuscles. They all start to combat  diseases.

The flow of blood to the body increases. The breath begins to move faster, and in these actions, the temperature of the body increases. This increased temperature is known as fever.