each day to avoid becoming dehydrated.

To prevent stones from returning, you should aim to drink up to 3 litres (5.2 pints) of fluid throughout the day, every day.

You’re advised to:

• drink water, but drinks like tea and coffee also count
• add fresh lemon juice to your water
• avoid fizzy drinks
• do not eat too much salt

Keeping your urine clear helps to stop waste products from getting too concentrated and forming stones.

You can tell how diluted your urine is by looking at its colour. The darker your urine is, the more concentrated it is.

Your urine is usually a dark yellow colour in the morning because it contains a build-up of waste products that your body produced overnight.

Drinks like tea, coffee and fruit juice can count towards your fluid intake, but water is the healthiest option and is best for preventing kidney stones from developing. You should also make sure you drink more when it’s hot or when you’re exercising to replace fluids lost through sweating.