Why does a fever get worse at night?

Fevers often spike at night due to our body's natural circadian rhythm and immune system activity. While common, if the fever is very high, persistent, or accompanied by other severe symptoms, it's always best to get it checked by a doctor to ensure there's no serious underlying issue.

For diabetics, a worsening fever at night can also be a concern as it can impact blood sugar levels. My doctor always advises to monitor sugar closely when sick. Generally, it's due to our body's immune system being more active at night, but don't ignore it if it's very high.

Ugh, tell me about it! Fevers always seem to be worse when you just want to sleep. Don't stress too much, it's pretty normal. Our body's immune system gets more active at night, and also, during the day you're distracted, at night you just feel everything more intensely. Keep sipping warm water!

Totally true, fevers are always worse at night. Our circadian rhythm plays a big role.