Urine foam persistent with diabetes, kidney disease, urinary tract tumors and so on. 1. Diabetes: diabetic patients, the sugar or ketone bodies in the urine increase, will cause changes in the surface tension of the urine, the patient will appear in the urine foam persistent performance. 2. Kidney diseases: such as membranous nephropathy, proliferative glomerulonephritis, diabetic nephropathy, etc., patients with increased protein in the urine, resulting in a change in the surface tension of the urine, the appearance of persistent urine foam. 3. Urinary tract tumors: such as bladder tumors, kidney tumors, etc., can make the red blood cells, white blood cells and other components of the urine change, thus causing the urine foam persistent. If you have symptoms of persistent urine foam, it is recommended that you go to the hospital to find out the cause and get timely treatment.