You get dehydrated when your body loses more liquid than you putting into it – for instance if you’re exercising or spend too long in the sun without drinking. You can also get dehydration if you’ve been sick or have diarrhoea, or if you’ve drunk too much alcohol (BBQs, right?). It can make you tired, dizzy, and make your pee super yellow and stinky.
It’s pretty basic advice for this one – just keep drinking! Water, that is. If you drink enough during the day you should be fine, but if you think you’re dehydrated start with small sips and then gradually drink more until you’re feeling better and your pee is a more healthy, pale colour. Alcohol and sugary drinks aren’t great for rehydration, so you’re best off sticking to water or squash.
Kids babies and older people can get dehydrated more easily, so keep an eye on them and make sure they’re getting enough fluids.
NHS Choices has some great advice on dehydration, and what to do if your symptoms get more serious.