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DehydrationÂ occurs when yourÂ body loses more fluid than you take in.
When the normal water content of your body is reduced, itÂ upsets the balance of minerals (salts and sugar) in your body, which affects the way it functions.
Water makes up over two-thirds of the healthy human body. It lubricates the joints and eyes, aids digestion,Â flushes out waste and toxins, and keeps the skin healthy.
Some of the early warning signs ofÂ dehydration include:
A baby may be dehydrated if they:
The bodyÂ is affectedÂ even when you lose a small amount of fluid.
Read more about the symptoms of dehydration.
Dehydration is usually caused by not drinking enough fluid to replace what we lose. The climate, the amount of physical exercise you are doing (particularly inÂ hot weather)Â and your diet can contribute to dehydration.
You can alsoÂ become dehydrated as a result of an illness, such asÂ persistent vomiting and diarrhoea, orÂ sweating from a fever.
Read more about the causes of dehydration.
Anyone can become dehydrated, but certain groups are particularly at risk. These include:
If you're dehydrated, drink plenty of fluidsÂ such as water, diluted squash or fruit juice. These are much more effective than large amounts of tea or coffee. Fizzy drinks may contain more sugar than you need and may be harder to take in large amounts.
If you're finding it difficult to keep water down because you're vomiting,Â try drinking small amounts more frequently.
Infants and small children who are dehydrated shouldn't be given large amounts of water alone as the main replacement fluid. This isÂ because it can dilute the already low level of minerals in their body too much and lead to other problems.
Instead, they should be given diluted squash or a rehydration solution (available from pharmacies). You might find a teaspoon or syringe can be helpful for getting fluid into a young child.
If left untreated, severe dehydration can be serious and cause fits (seizures), brain damage and death.
Read more about treating dehydration.
See your GP if your symptoms continue, despite drinking plenty of fluids, or if you think your baby or toddler is dehydrated.
If your GP suspects dehydration, you may have a blood test or a urine test to check the balance of salts (sodium and potassium) in your body.
You should also contact your GP if your baby has hadÂ six or more episodes of diarrhoea in the past 24 hours, or if they have vomited three times or more in the past 24 hours.Â
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