Why Do You Get Sick on Holiday? Understanding Leisure Sickness and Chronic Stress

Why Do You Get Sick on Holiday? Understanding Leisure Sickness and Chronic Stress

Have you ever wondered why you get sick the moment your holiday or vacation finally begins?

You spend months working under pressure, juggling deadlines and pushing through long days... then the time off finally arrives and you're lying in bed with a cold, a migraine, a fever or complete exhaustion.

You finally have time to relax, so why does your body seem to choose that moment to fall apart?

It's so common that researchers have actually given it a name: Leisure Sickness.

What Is Leisure Sickness?

While it's not an official medical diagnosis, leisure sickness describes a pattern where people develop symptoms such as fatigue, headaches, colds or flu-like symptoms when work stress suddenly comes to an end.

At first glance, it doesn't make much sense. Shouldn't rest make us feel better? The answer lies in what has been happening long before the time off even began.

When we're under constant pressure, our nervous system shifts into survival mode. Stress hormones such as cortisol and adrenaline help us stay focused, alert and productive. They allow us to keep going, even when we're tired. This state, often referred to as the fight-or-flight response, is designed to help us deal with short periods of stress. The problem is that many of us stay there for weeks or even months.

Why Does Your Body Wait Until Vacation to Get Sick?

There's a physical reason behind the timing. While you're under pressure, adrenaline and cortisol work together to keep you alert and pushing forward.

The moment that pressure lifts, adrenaline tends to drop away almost immediately, but cortisol takes longer to clear from your system. For a short window, you're left with a surplus of cortisol and without the adrenaline that had been masking how depleted you'd actually become.

That shift can temporarily affect your immune system, which is part of why colds, migraines and flu-like symptoms tend to surface right as you finally sit down to rest.

Then the pressure stops, the meetings disappear, the deadlines are over and your time off begins. Your nervous system finally gets the message that it can relax. That's often when the body begins to catch up.

It isn't that the holiday made you sick - it's that your body finally had permission to stop holding everything together.

A Pattern I Knew Well

This is something I know well because it used to happen to me. During my years in the corporate world, I could keep going for months without slowing down. Looking back, I can see I was living with chronic stress and moving closer to burnout without even realizing it. Then I'd finally go on holiday and, within a day or two, I'd get sick.

I see this pattern constantly in my clients too - capable, driven professionals who handle everything with ease - right up until they stop. And it's only once they slow down that the exhaustion they'd been carrying finally catches up with them. The vacation itself was never the issue, it simply brought to the surface everything that had already been building for weeks or months.

It's also why so many people spend the first few days of a trip unable to fully enjoy their time off. It takes them time to switch off, as their thoughts keep drifting back to work projects, mentally reviewing tasks, or sneaking a peek at their inbox.

The nervous system doesn't switch off just because a flight has landed. It needs time to catch up.

Ultimately, it's less about avoiding getting sick on vacation, and more about what we do throughout the year to allow ourselves to feel safe enough to rest before our body forces us to.

More often, it isn't the amount of work that's driving this - it's a set of beliefs sitting quietly beneath the surface. Beliefs that everything depends on you, that saying no doesn't feel like an option, that taking a break means falling behind and that rest is something you need to earn first.

Booking a flight doesn't switch any of that off - those beliefs come with you, wherever you go.

Lasting change doesn't happen by pushing through until your next break. It happens by understanding the subconscious patterns and nervous system responses that keep you in survival mode, and gradually creating a healthier way of living and working.

How to Support Your Nervous System Year-Round

Looking after your wellbeing isn't something to save for annual leave. Small, consistent habits throughout the year can make a significant difference.

Regular movement, strength training or walking, daily breathwork, taking short breaks during the day, spending time in nature, practicing gratitude, getting quality sleep and creating moments to genuinely switch off all help regulate the nervous system and reduce the effects of chronic stress.

Just as importantly, begin to notice the subconscious patterns that keep you constantly switched on.

Do you find it difficult to slow down? Do you feel guilty when you rest? Do you believe you always have to be productive or available? These patterns often drive chronic stress without us even realizing it.

If you'd like to better understand the patterns that may be keeping you in survival mode and learn how to create lasting change, I'd be happy to explore that with you.

And in the meantime, I hope you get to enjoy your next well-deserved break, and come back from it truly refreshed.