What are the 10 Indicators of Kidney Stones?

Pain is the hallmark symptom of kidney stones. Known as renal colic, this pain can be severe and often begins suddenly in the lower back or side. As the stone moves through the urinary tract, the pain may radiate to the abdomen or groin. Some people describe it as cramping or throbbing, while others feel sharp spasms that come in waves. The intensity and location of the pain typically depend on where the stone is lodged.

A stone that moves into the ureter or near the bladder can cause a burning or stinging sensation during urination. The pain occurs because the stone irritates the lining of the urinary tract or partially blocks the flow of urine. Discomfort may increase as the stone gets closer to the bladder, and in some cases, urinating becomes difficult or feels incomplete.

Kidney stones can trigger nausea and vomiting, often as a response to intense pain or as part of the body’s reaction to a urinary obstruction. In some cases, the discomfort interferes with digestion or activates the same nerves that signal nausea. If vomiting persists or leads to dehydration, it’s important to seek medical care.

Heavy or unexplained sweating may occur during a kidney stone episode, especially when pain levels are high. This symptom can also accompany nausea or fever and is often part of the body’s stress response. Though sweating alone isn’t a clear indicator of a stone, it may appear alongside other more specific symptoms.

Hematuria, or blood in the urine, is a common sign of a kidney stone. The urine may appear pink, red, or brown depending on the amount of blood present. This occurs when a stone irritates or damages the lining of the urinary tract. Though not always visible, even microscopic traces of blood warrant a medical evaluation.

Urine that appears cloudy or has an unusually strong odor may indicate a kidney stone, especially if accompanied by other symptoms. These changes can result from bacteria trapped behind a lodged stone, which can increase the risk of a urinary tract infection. Prompt treatment helps prevent further complications.

Frequent urination — or at least an urge to urinate — can indicate a kidney stone and may accompany a stinging sensation when urinating. These symptoms are most likely to appear when the kidney stone moves into the lower urinary tract. Like many other symptoms, these are not exclusive to kidney stones and may represent a different issue such as a urinary tract infection. If a kidney stone is the cause, these symptoms may last for longer than 24 hours.

Many people develop urinary tract infections (UTI), which can cause mild discomfort to extreme pain. Recurring UTIs could be a symptom of kidney stones. A doctor can distinguish between an infection caused by stones and one caused by other factors.

Kidney stones can sometimes cause an affected individual to become feverish and exhibit flu-like symptoms. Though this is rarely a diagnostic symptom of the condition, fever accompanied by lower back and stomach pains and other symptoms listed here can point to kidney stones. Often, this symptom is due to infection in the kidneys, a potential complication of a kidney stone.

If a kidney stone becomes quite large, the person can experience pain when sitting or lying down for extended periods of time. This occurs when the seated position places pressure on the stone, causing it to press into sensitive organs. This symptom is especially problematic if it makes sleep difficult, as the body needs rest to efficiently break down and expel the stone.