Can dehydration cause kidney stones?

Urine normally carries dissolved minerals and other substances out of the body. When you lose fluid or drink too little, there is less water to dilute them. Crystals can then form and join into a stone. Dehydration is a risk factor, not the only explanation; family tendency, diet, some medicines, and certain health conditions may also play a part. A stone may cause sharp pain in the side or back, pain that travels towards the groin, nausea, or blood in the urine, although symptoms vary.

Drink regularly across the day and increase fluids during heat, exercise, vomiting, or diarrhoea. Water is a suitable default for many people. If you have had a stone, ask about testing the stone or urine because prevention depends on its type and your health. Do not force fluids if a clinician has prescribed a restriction for heart or kidney disease. If stone-like pain begins, seek advice about pain relief and assessment rather than assuming it is only dehydration.

Arrange prompt medical assessment for severe or persistent side pain, blood in the urine, or pain with nausea. Seek urgent help for fever or chills with urinary pain, repeated vomiting, inability to pass urine, faintness, or pain that is suddenly severe. A blocked urinary tract with infection can become serious and needs timely treatment.

Ask whether your symptoms need imaging or urine tests, what stone type is suspected, and how much fluid is suitable for you. Mention previous stones, family history, bowel illness, and any medicines or supplements.