Fever reducers treat a symptom, not the cause of an illness, and lowering your temperature may get in the way of your body's normal defenses and actually prolong the sickness. Generally, a fever on its own isn't dangerous and there's no real need to treat it.

Is having a fever a good thing?

FACT. Fevers turn on the body's immune system. They help the body fight infection. Normal fevers between 100° and 104° F (37.8° - 40° C) are good for sick children.

Why does fever increase at night?

At night, there is less cortisol in your blood. As a result, your white blood cells readily detect and fight infections in your body at this time, provoking the symptoms of the infection to surface, such as fever, congestion, chills, or sweating. Therefore, you feel sicker during the night.