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Renal tubular acidosis, a kidney condition that makes the urine more acidic. Kidney stones form more easily in acidic urine. ... Uric acid, calcium oxalate, and cystine stones form more readily in acidic urine, so this prevention strategy hinges on keeping the urine slightly alkaline.
It could be because your urine's too acidic, study reveals. 1  Acidity of urine may influence how well bacteria can grow in urinary tract. 2  The more acidic, the more bacteria can flourish, raising risk of infetion. 3  Diet may also play a role, affecting the bacteria excreted through urine.