Is hematuria associated with kidney stones indicative of stone passage?

If a patient has urinary tract stones accompanied by hematuria, this alone cannot confirm whether the stones are being passed. Details are as follows:

Does hematuria associated with kidney stones indicate stone passage?

If a kidney stone is fixed and hematuria occurs, it may indicate an underlying infection—particularly a urinary tract infection (UTI). Kidney stones often have irregular surfaces, making them ideal sites for bacterial colonization. When immunity declines or fluid intake decreases, bacteria on the stone surface can proliferate significantly, potentially leading to a UTI.

Such infections may manifest as hematuria along with bladder irritative symptoms—including urinary frequency, urgency, and dysuria. Some patients may also experience flank pain, tenderness upon percussion over the renal area, or fever.

Alternatively, if the kidney stone is mobile and relatively large, its movement within the kidney may cause trauma to the renal pelvis mucosa, resulting in hematuria. However, excessively large stones cannot pass spontaneously through the ureter and require prompt surgical intervention.

Conversely, small kidney stones (<4 mm in diameter) typically pass uneventfully through the ureter. Stones measuring 4–6 mm may become lodged in the ureter, causing mechanical irritation and subsequent hematuria. Therefore, hematuria in kidney stone patients may or may not signify active stone passage.

Patients with kidney stones who develop hematuria should seek timely medical evaluation to determine the underlying cause and receive appropriate treatment. Additionally, dietary modifications are recommended—specifically avoiding high-oxalate foods such as spinach, strawberries, grapes, and tomatoes.

We hope the above information is helpful. Wishing you good health and happiness!