Why do we always feel worst at night / when we go to bed when we’re sick?
In: Biology
Your immune system is a really resource intensive system for your body to run, which is fine if it can fully focus on getting better. It does this through a fever, inflammation, etc. However there are a lot of situations that can arise that have a higher priority than your immune system and for that your body has the stress response, which means flooding your body with a hormone called cortisol that suppresses – among other things – your immune system. During the day you have a lot of situations that warrant your body creating cortisol, but at night your body comes to rest and you generally no longer experience any stressful situations, so your immune system is free to ramp up to full capacity again. Which causes symptoms to increase.
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