Here's Why You Feel So Exhausted After a Holiday — and What You Can Do to Fix It

"There's low humidity in aeroplane cabins, which tends to dry us out," Dr. Brenner explained. "So drink plenty of water and try to minimize diuretic beverages, like caffeine and alcohol." He also advises to be aware of any food that takes moisture away from the body, such as dried fruit, salted nuts, salty chips and crackers, and processed foods with excess sodium.

Before you leave for holiday, do the necessary prep at work to ensure a calm return. "Let people know you'll be out of the office and not to contact you unless it's a dire emergency," Dr. Jackson said. "Better yet, leave someone else in charge in your absence to take care of things." By preparing mentally and doing as much as you can on your to-do list beforehand, you'll give yourself a much smoother transition back into everyday life once the holiday is through.

"If you're changing time zones, consider setting your watch to the time zone of your destination as soon as you board the plane and behave as you would in that time zone," Dr. Brenner advised. You can do this by going to sleep at a reasonable hour, getting up with the sun, and eating meals at proper times throughout the day.

Many times when we travel, we get so caught up in filling up our itineraries that we never really make time for a bit of R & R, even though we really should. "Relaxing is very important and is the reason why we take holidays," Dr. Jackson said. "Be sure to schedule time to do very little or nothing at all. There should be days when you have nothing in particular planned."

Many times when we travel we try to spread ourselves too thin, often returning to work the next day or even the same day after a strenuous flight. "When you plan to take your holiday, schedule another day at home before you return back to work," Dr. Jackson said. "Travelling to different time zones can be taxing, so slowing down and easing back in will allow your body to adjust before getting back to the routine of things."