Urine spilled on the ground with a lot of foam can be considered physiological factors, nephritis and urinary tract infections, it is recommended that further urine routine examination to clarify the cause. 1. physiological factors: if due to hold urine for a long time or drink less water to lead to urine concentration, plus if the male standing urination, etc. may lead to urine in the foam production. 2. nephritis, kidney disease: if there are immune disorders, immune complexes take advantage of the opportunity and other factors may lead to glomerulonephritis, nephropathy, etc., which will cause the protein content in the urine to increase, easy to cause the emergence of foamy urine. 3. Urinary tract infection: If bacteria, fungi, etc. lead to urethritis, cystitis and other urinary tract infections, it may also lead to an increase in the cellular components and metabolites in the urine, causing the appearance of foamy urine. Foamy urine may also be caused by other factors, therefore, it is recommended that patients go to the hospital under the guidance of the doctor for further urine routine and other tests to determine the cause of treatment.