What are the two most common causes of bladder stones?

What Causes Bladder Stones? The Most Common Triggers Explained

Bladder stones aren't just uncomfortable—they can signal underlying issues with how your body processes urine. While they may develop for various reasons, two of the most common causes stand out: dehydration and holding in urine for too long.

When you don’t drink enough fluids, your urine becomes more concentrated. This increases the likelihood of minerals crystallizing and clumping together in the bladder, eventually forming stones. It’s a simple yet often overlooked risk—especially in people who regularly skip water throughout the day.

Equally problematic is the habit of ignoring the urge to urinate. Delaying bathroom trips allows urine to sit in the bladder longer than it should. Over time, stagnant urine can lead to mineral buildup and stone formation. This is particularly concerning for people with inconsistent bathroom routines, such as those with demanding work schedules or limited access to restrooms.

For men, another key factor comes into play: an enlarged prostate. As the prostate grows, it can block the normal flow of urine, preventing the bladder from emptying completely. This residual urine becomes a breeding ground for stones. In fact, men with recurring bladder stones often have undiagnosed prostate-related issues that need medical attention.

While not all bladder stones can be prevented, staying well-hydrated and responding promptly to the urge to urinate significantly reduces the risk. Recognizing these common triggers is the first step toward better urinary health—and avoiding the sharp pain that bladder stones can bring.