As people count down the days till they jet off somewhere nice and hot, the preparation is real for planning to relax by a pool and do nothing for a while.
As people step off the plane, that blissful feeling of being out of office kicks in and many end up chilling for the first day or so before going off to do something fun.
However, some may not even be away for a few hours before they find themselves dosing up on painkillers or tissues, as an annoying cold or headache arrives.
If it feels like you suddenly get unwell when you finally hit the pause button, you’re not imagining it – there’s even a medical term for it.
It's called the 'let-down effect', and a health expert has explained this issue in detail, and what you can do to avoid it.
The 'let-down effect'
Dr Suhail Hussain, a personal physician and private home visiting GP, said: "This is known as the ‘let-down effect.
"When the body is used to functioning on high levels of [stress hormones] cortisol and adrenaline and they suddenly decrease, our immune system is exposed and then we’re prone to minor infections and excessive tiredness.
"Pain and muscle aches also increase – adrenaline increases muscle tension, so imagine a rubber band always pulled tight, what happens when you let go?
"There may also be a spike in mental health problems, such as acute anxiety and panic attacks. Flare-ups in pre-existing chronic conditions is also a common phenomenon, for example migraine and asthma attacks."
The ‘let-down effect’ can strike after a brief period of intense stress, like when you are packing for a holiday and have to get everyone organised, or when you've had a stressful week at work before jetting off.
And for many people, it hits when you finally get to put down your to-do list and go on holiday.
What's the deal with stress hormones?
Stress hormones serve an essential purpose, and we do need them to function, so it's not always bad news.
"Basically, we are programmed to respond to danger – ‘fight or flight’ – so in stressful situations, there is an increase in levels of stress hormones adrenaline and cortisol," Dr Hussain explains.
"Together, these two hormones control mood, motivation and fear. In periods of stress or heightened anxiety, adrenaline levels rise – causing an overdrive of the sympathetic nervous system, resulting in racing pulse, high blood pressure, sweating, etc."
Stress hormones also play a role in regulating inflammation, metabolising nutrients, and aiding immune function, sleep and energy. But ideally, they wouldn’t stay at raised levels for too long.
Dr Hussain said: "If these hormones are always ‘on’, then inflammatory processes are accelerated and your immune system is impaired.
"Consistently high levels of cortisol in your blood can lead to inflammation and a weakened immune system."
Can you avoid the 'let-down effect'?
Dr Hussain says: "You can try to lessen the impact of the ‘let-down effect’ by de-stressing slowly. Instead of crashing and burning, try to maintain a bit of activity on the holiday or some degree of exercise, such that there’s not a massive decrease in stress hormone levels, meaning you can allow the body to acclimatise slowly."
Not getting sick on holiday isn't the only thing you should be concerned about - if your body is giving warning signs about chronic stress, you need to listen up.
The expert expains: "Constantly running on high levels of stress is very bad for you.
"It leads to the problems mentioned above but also longer-term consequences, such as plaque formation in arteries, leading to coronary events and strokes, depression and anxiety, and even addiction.
"Levels of obesity are also increased."
Dr Hussain says that symptoms to look out for include: "Recurrent illnesses, feeling tired, lack of energy. Poor response to glucose, leading to type 2 diabetes, elevated blood pressure and disruption of the sleep-wake cycle."
If you have any worries, speak with your GP, and Dr Hussain suggests finding ways to make managing stress in everyday life.
"Build in regular relaxation to your daily schedule. Get out to walk, spend time in the sun, observe nature. Listen to relaxing music. Make a regular sleep schedule, read, spend time with family and loved ones," he says.
"Don’t just work and work and work for the expectation of a big holiday at the end of it."
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