More urine is not necessarily diabetes, polyuria is also seen in other clinical diseases, such as uremia, patients show polyuria, increased nocturia, the daily urine volume reaches 3000-4000ml, some patients reach 4000-6000ml, not accompanied by polyphagia, emaciation, the patient’s blood glucose is normal, can exclude diabetes mellitus. Hypercalcemia patients can also appear polyuria, but not accompanied by polyphagia, emaciation, blood sugar is normal, monitoring blood calcium is significantly higher than normal, can be diagnosed as hypercalcemia caused by polyuria. Polyuria can also occur after oral diuretic drugs, but after stopping diuretic drugs, the symptoms of polyuria can be improved, while the patient’s blood sugar is normal, diabetes can be excluded. For patients with polyuria, it needs to be combined with whether the patient is combined with symptoms of diabetes such as polyphagia, emaciation, fatigue, paroxysmal blurring of vision, etc. Meanwhile, pay attention to the monitoring of blood glucose, and if the blood glucose reaches the diagnostic standard of diabetes, then the diagnosis of diabetes can be made.