For many, summer brings to mind thirst, fatigue, and heatstroke. But doctors warn that the kidneys are among the first organs to suffer silent damage during extreme heat. Urologists say that every year, as temperatures rise, hospitals witness a significant increase in patients presenting with kidney stones, urinary tract infections, burning urination, reduced urine output, and severe pain in the lower back and flank region.
Doctors at CARE Hospitals, Malakpet explain that during summer, the body loses substantial water through sweating. If this loss is not adequately compensated with fluid intake, hydration levels drop and urine becomes highly concentrated. Under such conditions, minerals present in the urine—including calcium, oxalate, and uric acid—begin to crystallise, gradually leading to the formation of kidney stones.
“A clear rise in urology cases becomes evident once summer begins. We frequently see patients with kidney stones, urinary tract infections, burning urination, and severe flank pain. Many assume this is a condition that develops overnight, but in reality, it builds gradually due to repeated dehydration and inadequate water intake over time,” said Dr. Naveen Kumar, Senior Consultant Urologist and Andrologist, CARE Hospitals, Malakpet.
Studies indicate that in India, nearly 12 out of every 100 people are likely to experience kidney stones at some point in their lives, with the burden appearing significantly higher in regions characterised by prolonged and extreme heat.
However, doctors caution that inadequate water intake is not the only contributor.
“Low water intake alone does not explain the entire problem. Several lifestyle and dietary factors aggravate the risk during summer, including high-salt diets, processed foods, frequent outside meals, and excessive consumption of soft drinks often mistaken for cooling beverages,” said Dr.Venu Manne, Senior Consultant Urologist, CARE Hospitals.
also warn that alongside kidney stones, the risk of urinary tract infections rises during summer. Reduced water intake decreases urine output, allowing bacteria to remain in the urinary tract for longer periods instead of being flushed out naturally, thereby increasing infection risk.
Certain groups require particular caution, especially women, individuals with diabetes, men with prostate-related issues, and those with a history of recurrent UTIs.
Another common concern, doctors say, is that many people drink water only when they feel thirsty. By then, dehydration may have already set in. There is also a widespread misconception that tea, coffee, soft drinks, and packaged juices can adequately replace water.
“Water remains the only true source of effective hydration. Excessive intake of caffeinated or high-sugar beverages can worsen dehydration and, in some cases, contribute to metabolic changes that increase the risk of kidney stone formation,” Dr. Naveen Kumar added.
Symptoms That Should Not Be Ignored
· Sudden severe pain in the lower back or flank area
· Burning sensation during urination or blood in urine
· Reduced urine output
· Frequent urge to urinate
· Fever, vomiting, or unusual fatigue
· Pressure or pain in the lower abdomen
Doctors caution that ignoring these symptoms can worsen the condition and may eventually require emergency medical intervention.
How to Protect Your Kidneys This Summer
· Drink water before you feel thirsty
· Carry a water bottle whenever stepping outdoors
· Those working in the sun should increase fluid intake further
· Include water-rich foods such as watermelon, cucumber, sweet lime (mosambi), and coconut water in the diet
· Reduce intake of high-salt foods, packaged snacks, and soft drinks
· Avoid prolonged sun exposure between 12 PM and 4 PM
“Most kidney stones and urinary tract infections seen during summer are entirely preventable. Simple habits such as proper hydration and timely medical attention can go a long way in protecting the kidneys from serious complications,” doctors said.
