Why do I always get sick on holiday?

Braving New Elements

Even if you’re staying relatively local, changing your physical environment exposes your system to a ton of new things that it may or may not be ready to experience. From unfamiliar foods to new allergens, there’s a solid adjustment curve required when you set off for a vacation. It might not feel super severe or all that noticeable, but it’s there. And the more you challenge your body’s status quo, the harder it has to work to equalize. And you’re asking your body to do this work when it’s already struggling.