Dehydration: How it affects your health 

Drink water to avoid dehydration

Warnings about dehydration go hand-in-hand with health advice but why exactly is it so important to wellbeing? 

Water really is the elixir of life; the body can survive much longer without food than without water. It is water that keeps our bodies functioning. 

While dehydration can make itself felt even in the early stages, if it becomes severe there is a risk it could prove fatal. 

Why is dehydration so dangerous? 

Fluids help the blood to move around the body taking oxygen to vital organs. When the body becomes severely dehydrated it can cause low blood pressure, removing the body’s ability to adequately move blood around. If the vital organs do not receive enough oxygen they begin to fail. 

Serious problems also arise when dehydration upsets the levels of electrolytes in the body, such as sodium and calcium. Water is essential to maintain the correct levels of electrolytes, which send signals to cells around the body to control functions such as muscle movement and temperature control. 

If the levels are disrupted and incorrect signals sent this can cause heart arrhythmia, seizures or a coma.  

What causes dehydration? 

Dehydration is caused when the body loses more fluid than it takes in. This is usually through people not drinking water frequently enough or rapidly losing fluids through sickness and diarrhoea. 

Some people are more susceptible to suffering from dehydration. These include:  

The elderly – who may not be aware they need to drink more water. 

Young children – water makes up more of their body and they may also not always be able to say that they are thirsty. 

People suffering from conditions such as diabetes are also more likely to become dehydrated, as are people taking medications that can cause dehydration as a side effect. 

Exercise and hot weather can also speed up the loss of fluid from the body and need to be accounted for by drinking more water.  

Signs of dehydration 

  • Fatigue 
  • Thirst/ dry mouth 
  • Dark urine and going to the toilet less frequently 
  • Dizziness 
  • Headache 

More serious symptoms include: 

  • Feeling confused 
  • Weak or rapid pulse 
  • Lasting dizziness 

Treatment for dehydration 

Caught early enough dehydration can be treated by drinking adequate levels of water. Taking an oral rehydration solution will also help to rebalance electrolytes. 

In cases of severe dehydration it is important to seek urgent medical help as the patient will quite possibly need to be given fluids intravenously. 

Drink water to beat dehydration 

Of course, where possible, it is best to take steps to ensure you remain hydrated. If you enjoy exercising stay hydrated throughout the week – when you feel the signs of dehydration that means it has already become an issue, topping up fluids regularly is the best way to avoid that. 

Likewise make drinking filtered water regularly a part of your routine so your body remains well hydrated. 

When suffering from a stomach bug it is harder to stay hydrated but sipping fluids frequently can help. 

Regularly drinking filtered water is a simple way to help protect your body from dehydration. 

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