Dagliflozin does not cause excessive urinary foam, and its dosing instructions indicate that urinary tract infections and increased urination can occur among the adverse effects, which are manifested as frequent urination, polyuria and increased urine output, and not excessive urinary foam. Dagliflozin is a hypoglycemic drug. Adverse reactions such as hypovolemia, urinary sepsis and pyelonephritis, perineal necrotizing fasciitis, fungal infections of the genital tract, urinary tract infections, and increased urination may occur during the use of the drug and are manifested as frequent urination, polyuria, and increased urine output, and not increased urinary foam. Increased urine foam may be caused by diabetes mellitus itself, diabetes mellitus patients with poor blood glucose control can lead to increased glucose concentration in the urine, then it will lead to increased surface tension of the urine, which leads to the phenomenon of increased urine foam. Dagliflozin should be standardized under the guidance of a doctor, allergic reactions to this drug, dialysis should be prohibited.