Why dehydration causes back pain

22 January 2020

On average an adult needs 1.5-2 litres of hydration during the day. The discs in your spine need water.

a man wearing glasses and a white shirt is sitting in front of a pink background .
The discs in your back act as shock absorbers to reduce the wear and damage to your spine. They are made of an outer shell and an inner, almost liquid centre, much like a jam doughnut. The inner centre takes the majority of the load when we stand up. Over the course of a day, the discs lose water and become dehydrated and this is why at the end of the day you are 7-15mm shorter that you are when you first stand up in the morning. 

Night time recovery

Overnight the discs rehydrate (providing there is free water in the body). This enables them to work at their optimum and this in turn reduces the likelihood of back pain.
Some people reduce their fluid intake in the evening to reduce the risk of accidents in the night or to reduce the number of times they need to get up in the night. This may result in poor rehydration of the discs and the resulting consequences of back pain as the load put on the back cannot be carried as effectively.

Flex and rotate

During the day, simple flexing of the back in a side-to-side motion or a rotating motion will help to rehydrate, again providing there is free water in the body to replenish supplies.

Drinking enough

This is only one of many reasons why effective hydration is essential for the body to work at its best. On average an adult needs 1.5-2 litres of hydration (unless exercising or in hot conditions when more will be required) which can be in the form of water, diluted juices, fresh juices, carbonated drinks and caffeine free hot drinks. Caffeinated drinks can be counted for regular coffee and tea drinkers, but alcohol cannot be counted due to its dehydrating properties.

5 November 2026
PerCurra CEO, Gill Heppell, has expressed her delight after being named a finalist in the Women in Tech category at the Women Achieving Greatness in Social Care Awards 2026.
by Percurra • 2 November 2026
Discover how Nottingham families can plan respite care efficiently, ensuring guilt-free breaks while loved ones remain happy at home.
by Percurra • 26 October 2026
Discover how companionship care in Nottingham eases loneliness and boosts wellbeing. Build a plan to keep you independent.
by Percurra • 20 October 2026
Explore live-in care options in Nottingham. Discover trends and steps that maintain independence for you or a loved one at home in 2026.
by Percurra • 20 October 2026
Discover how Nottingham families can ease hospital discharge, recover safely, and stay independent at home in 2026 with trusted support.
by Percurra • 5 October 2026
Learn how to shape tailored home care for Nottingham homes around your routines and preferences, keeping choice and control.
by Percurra • 1 October 2026
Discover how accessible holiday support in the UK helps you enjoy getaways with trusted carers, tailored plans, and genuine peace of mind.
by Percurra • 23 September 2026
Discover how personal care for Nottingham families protects dignity and independence with respectful washing, dressing, and continence support at home.
by Percurra • 23 September 2026
Discover a practical playbook for learning disability support in Nottingham to help your family live more independently at home in 2026.
23 September 2026
PerCurra Franchising Ltd is delighted to announce that Monica Maparanyanga, owner of PerCurra North Northamptonshire, has signed a new franchise agreement that will see her remain part of the PerCurra home care network for a further 10 years.
More posts