Hydration and diet are key to preventing kidney stones

High temperatures and increased sweating elevate the risk of kidney stone formation by concentrating urine and promoting the crystallization of substances such as calcium, oxalate, and uric acid. To prevent crises, urologist Pedro Bastos recommends maintaining an adequate urinary volume, with a target of producing approximately 2.5 liters of urine per day. This typically requires an intake of 2.5 to 3 liters of fluids daily, though higher amounts may be necessary during intense heat or exercise.

Monitoring urine color is a practical hydration indicator; clear urine generally suggests adequate hydration, while dark yellow urine may indicate insufficient fluid intake. Dietary adjustments are also critical, specifically reducing salt and ultra-processed food consumption, as excessive sodium increases calcium excretion in urine. While alcohol does not directly cause stones, it can contribute to dehydration.

Medical attention is required immediately if symptoms include fever, intractable pain, persistent vomiting, or a lack of urine production, as these may indicate infection or risks to renal function. Typical symptoms of a kidney stone crisis include sudden, intense lower back pain radiating to the groin, nausea, and blood in the urine.