Our bodies are made up of about two-thirds water. We only need the total water level to drop by as little as a few percent for us to become dehydrated – that is, lacking in water. Lack of water can eventually lead to problems within the body, such as kidney stones, and liver, muscle and joint damage. 

Having Crohn’s Disease or Ulcerative Colitis (the two main forms of Inflammatory Bowel Disease - IBD) can sometimes increase the risk of becoming dehydrated. This information sheet looks at why this may happen and some ways to prevent and treat it. 

What is dehydration?
What causes dehydration?
Will I become dehydrated?
How will I know if I am dehydrated?
What should I do if I become dehydrated?
How can I avoid becoming dehydrated?
Will increasing my fluid intake make my diarrohea worse?
Maintaining hydration with a stoma
Hyponatremia (overhydration)
Help and support from Crohn's & Colitis UK
How we write our information

Last reviewed: June 2017