Alcohol is a diuretic, which means it encourages the kidneys to lose extra fluid. This is why you go to the toilet much more when you drink alcohol. For every 1g of alcohol you drink, urine excretion increases by 10ml.
Alcohol can also have the effect of making you sweat more. The combination of sweating more in the heat and going to the toilet more regularly means you could lose more fluid than you take in and become dehydrated.
If you’re concerned about being dehydrated, look out for the following symptoms:
• A dry, sticky mouth;
• Sleepiness or tiredness;
• Decreased urination;
• Dizziness or light headedness;
Drink water even when you aren’t thirsty – alternating your alcoholic drinks with something hydrating can keep you feeling well when having fun.