A leading surgeon has warned that the UK is sitting on a kidney stone "time bomb" fuelled by the growing obesity crisis.
Bhaskar Somani said annual admissions for renal stone treatment were increasing by between 5% and 10% - with a prevalence 75% higher in obese patients.
He said poor diets and lifestyles were a "key factor" in the development of the condition, with consumption of too much animal protein and levels of salt creating a "breeding ground" for kidney stones.
Mr Somani said: "Nearly two-thirds of men and women in the UK are obese or overweight with 25% of adults classed as obese, and we know diet and lifestyle can be a major cause of stones.
"When you consider the total number of hospital admissions for patients with stone episodes increased by 63% over the past decade, it is clear we have a problem."
Mr Somani said: "Kidney stones are often a forgotten outcome of weight gain and obesity, but the impact of the condition on people's quality of life should not be under-estimated.
"Stones are a time bomb and in a large number of cases will be an indication of someone going on to suffer other serious health problems unless actions are taken to improve lifestyle."