There are special groups of people in some occupations who are more likely to develop urinary stones: 1. People who work in high temperature conditions. Examples include cooks, boilermakers, and other workers who work in hot shops. This is related to the high sweating and concentrated urine in hot environments. 2, brain workers: governance staff, office workers (the so-called “white collar” class) and seafarers and other economic income is relatively high, less active work staff. The incidence of urolithiasis in seafarers, for example, is higher than that of sailors. 3, physicians (especially surgeons) suffering from urolithiasis is also more. 4, the air force flight staff than the ground staff suffer from urinary stone disease more. The prevalence of kidney stones in pilots is 3.5 to 9.4 times higher than that of ground staff, mainly related to the high animal protein and animal offal in the diet of pilots 5, astronauts during space flight, due to low activity, high protein in the diet, reduced water consumption, vomiting and urine concentration; in the case of weightlessness in the urine calcium oxalate and phosphate supersaturation increased; urinary pH decreased and citrate content and other factors are are conducive to the formation of calcium oxalate and uric acid stones.