Why Do People Get Kidney Stones? Understanding the Causes Kidney stones are hard mineral deposits that form inside the kidneys and can cause severe pain when they move through the urinary tract. They are a common health problem, but many people don’t know why they develop. Understanding the causes can help in prevention. 1. Not Drinking Enough Water One of the biggest reasons people get kidney stones is dehydration. When you don’t drink enough water, urine becomes concentrated, allowing minerals and salts to stick together and form stones. 2. High Intake of Salt and Sugar Eating too much salt increases calcium levels in urine, which raises the risk of stone formation. Excess sugar, especially from processed foods and sugary drinks, can also contribute to kidney stones. 3. Diet High in Certain Foods Foods rich in oxalates—such as spinach, nuts, chocolate, tea, and beets—can increase the risk of stones in some people. Excessive animal protein (red meat, eggs) may also rai...