There’s an explanation.
We suffer from a bout of cold, fever or flu if we catch a viral bug. It usually persists for 3-4 days. Over the course of treatment, the symptoms seem to be less active and contained during the day but is completely opposite during the night. What could be causing this? Is it that the virus seems to be more prevalent during the night or is it simply because of the change in temperature?
A big reason for this to happen is our immune system. Just like our sleep schedules, our immune system also has a rest pattern of its own- when it is more active and when it is not.
How our immunity defends the body differs from day to night. Hence, doctors generally don’t rule out fever before 24-48 hours even if you are feeling completely fine during the day.
During the day, our immune cells protect us but as night approaches, immune cells get less active and do some inflammatory action, by deliberately increasing the body temperature in hopes of killing the bacteria. This phenomenon is what the doctors like to call ‘temporary fever’ to fight infections.
It isn’t about rest, but it’s the body’s defense mechanism ensuring that the entire immune defense force is prepared to put up a fight during the morning since it is the time when most productive things happen (yes, even for your body!). The brain also helps the immune system by keeping it distracted and occupied in doing other things.
During the day, even with a light fever, the patient remains occupied and gets ample rest but as night approaches, the body is all alone fighting against the fever. With no system in place, we feel that our temperature is rising and the medicines just aren’t working!