Drinking water and urinating a lot of small bubbles can be considered physiological causes, chronic nephritis or nephrotic syndrome and other kidney diseases and diabetes mellitus and other systemic diseases, it is recommended that further examination. 1. Physiological reasons: if due to drinking more water or eating a large amount of liquid diet, etc., may lead to an increase in the volume of urine, standing urination, etc., resulting in a greater impact of urine, strenuous exercise, etc., resulting in physiological proteinuria, etc., may cause foam in the urine. 2. Pathological conditions are mostly considered the presence of chronic nephritis, nephrotic syndrome, etc. so that the urine contains a large number of proteins, resulting in a decrease in the surface tension of the urine to appear more urine, foamy phenomenon. 3. In addition, if there is diabetes and other systemic diseases, there may also be excessive drinking and urination, as well as increased glucose content in the urine leading to the emergence of foamy urine. Therefore, it is recommended to go to the hospital for further examination to clarify the cause of the disease and treat the symptoms.