Foamy urine in men has the following reasons: 1, diabetes, diabetic patients with increased glucose concentration in the urine, prone to acid-base balance, resulting in changes in urine tension, foamy urine, you can test the urine routine to find out whether there is urine sugar, can be clear; 2, hypertension or long-term diabetic patients are prone to proteinuria, proteinuria leads to an increase in protein secretion, resulting in changes in the urine tension, foamy urine, testing of urine protein can be found to show positive. Urine, urine protein test can be found when the urine protein shows positive; 3, urinary system diseases, such as prostate inflammation, urinary system inflammation, tumors, etc., can lead to foamy urine, caused by leukocytes, excessive secretion of erythrocytes and mucus secretion; 4, hepatobiliary system diseases, urinary excretion of bilirubin increased, resulting in foamy urine; 5, physiological factors, urinary volume is too large and urination is too rapid, due to the impulses can cause Urine itself tension changes, leading to the phenomenon of foamy urine. So you can carry out routine urinalysis to further determine whether the emergence of foamy urine is pathological or physiological factors.