Urine foam may be physiological factors, but also may be the manifestation of certain diseases, such as kidney disease, diabetes, prostatitis, liver and gallbladder disease, etc., should be timely consultation to identify the cause. 1. Physiological factors: If you tend to hold your urine for too long, the impact of urination is greater, which can lead to an increase in the surface tension of the urine, appearing in the urine foam. 2. Pathologic factors: (1) kidney disease: in the presence of acute nephritis or chronic nephritis, the glomerular filtration barrier is damaged, and foamy urine may also occur. (2) diabetes mellitus: diabetic patients, if the urine contains glucose, or diabetes mellitus is not well controlled, the disease progresses, and when diabetic nephropathy occurs, the protein in the urine increases, and foamy urine may appear. (3) prostatitis: prostatitis patients produce more mucus secretions during excretion, the tension of urine will be reduced, and foamy urine is easy to appear. (4) Hepatobiliary diseases: Biliary and biliary tract diseases can lead to elevated bilirubin in the urine, which can also lead to foamy urine. If frequent foamy urine, should go to the hospital in time for examination, diet should be low salt, low potassium, low purine, drink more water, and for the cause of the active treatment.