Medically reviewed by M. Thurairaj, Registered physiotherapist. · Last reviewed June 2026.
How hydration affects how you feel
Even mild dehydration can contribute to headaches, low energy and difficulty concentrating for some people. In a warm, often air-conditioned environment, it is easy not to notice how little you have drunk over a busy morning. While hydration is not the answer to everything, it is a simple foundation that supports your energy and comfort, and it is easily neglected when work gets busy.
Simple ways to drink more
Keep a water bottle on your desk where you can see it, sip regularly rather than waiting until you are thirsty, and refill it as part of your breaks. Pairing a drink with another habit, like every time you finish a task or take a screen break, helps you remember. Getting up to refill also gives you a useful reason to move, which is a bonus for a desk-bound body.
The bigger picture
Hydration works alongside the other desk basics, taking breaks, moving regularly, decent posture and screen height, to keep you comfortable and feeling better through the day. If you get frequent or severe headaches despite drinking enough and taking breaks, it is worth seeing a doctor rather than assuming it is just dehydration. The simple habits help, but persistent symptoms deserve a proper look.
Key takeaways
- Mild dehydration can add to headaches and tiredness
- Air-conditioned, busy days make it easy to forget to drink
- Keep a visible bottle and sip regularly
- See a doctor for frequent headaches despite good habits
Frequently asked questions
Can dehydration cause headaches at work?
For some people, mild dehydration can contribute to headaches, low energy and poor concentration. Sipping water regularly through the day is a simple thing that helps.
How do I remember to drink water at my desk?
Keep a visible water bottle, sip regularly rather than waiting until thirsty, and pair drinking with another habit like finishing a task or taking a screen break.